Grade most commonly refers to: * Grade (education), a measurement of a student's performance * Grade, the number of the year a student has reached in a given educational stage *

Grade (slope) The grade (also called slope, incline, gradient, mainfall, pitch or rise) of a physical feature, landform or constructed line refers to the tangent of the angle of that surface to the horizontal. It is a special case of the slope, where zero ind ...

, the steepness of a slope Grade or grading may also refer to:

Music

* Grade (music), a formally assessed level of profiency in a musical instrument *

Grade (band) Grade is a melodic hardcore band from Burlington, Ontario, often credited as pioneers in blending metallic hardcore with the honesty and melody of emo, and - most notably - the alternating screaming/singing style later popularized by bands like ...

, punk rock band *

Grades (producer) Grades (born Daniel Traynor) is an English producer, songwriter and DJ based in London. His music encompasses elements of R&B, Hip Hop, 2step, House and Electronic. Career As an artist/DJ, Grades’ first original track "Freedom" was releas ...

, British electronic dance music producer and DJ

Science and technology

Biology and medicine

Grading (tumors) In pathology, grading is a measure of the cell appearance in tumors and other neoplasms. Some pathology grading systems apply only to malignant neoplasms (cancer); others apply also to benign neoplasms. The neoplastic grading is a measure of cel ...

, a measure of the aggressiveness of a tumor in medicine *

The Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach The GRADE approach (Grading of Recommendations Assessment, Development and Evaluation) is a method of assessing the certainty in evidence (also known as quality of evidence or confidence in effect estimates) and the strength of recommendations in he ...

Evolutionary grade A grade is a taxon united by a level of morphological or physiological complexity. The term was coined by British biologist Julian Huxley, to contrast with clade, a strictly phylogenetic unit. Definition An evolutionary grade is a group of s ...

, a paraphyletic group of organisms

Geology

Graded bedding In geology, a graded bed is one characterized by a systematic change in grain or clast size from one side of the bed to the other. Most commonly this takes the form of normal grading, with coarser sediments at the base, which grade upward into pr ...

, a description of the variation in grain size through a bed in a sedimentary rock *

Metamorphic grade Metamorphism is the transformation of existing rock (the protolith) to rock with a different mineral composition or texture. Metamorphism takes place at temperatures in excess of , and often also at elevated pressure or in the presence of che ...

, an indicatation of the degree of metamorphism of rocks *

Ore grade Ore is natural rock or sediment that contains one or more valuable minerals, typically containing metals, that can be mined, treated and sold at a profit.Encyclopædia Britannica. "Ore". Encyclopædia Britannica Online. Retrieved 7 April 2 ...

, a measure that describes the concentration of a valuable natural material in the surrounding ore

Engineering and technology

Grade (fasteners) A screw and a bolt (see '' Differentiation between bolt and screw'' below) are similar types of fastener typically made of metal and characterized by a helical ridge, called a ''male thread'' (external thread). Screws and bolts are used to fas ...

, the grade of nuts and bolts refers to the strength and material *

Grade (elevation at earth level) Grade most commonly refers to: * Grade (education), a measurement of a student's performance * Grade, the number of the year a student has reached in a given educational stage * Grade (slope), the steepness of a slope Grade or grading may also r ...

, in architectural engineering, the elevation of the earth surrounding a building *

Grading (earthworks) Grading in civil engineering and landscape architectural construction is the work of ensuring a level base, or one with a specified slope, for a construction work such as a foundation, the base course for a road or a railway, or landscape and ga ...

, the preparation and leveling of land for construction, especially of roads and railways *

Grade separation In civil engineering (more specifically highway engineering), grade separation is a method of aligning a junction of two or more surface transport axes at different heights (grades) so that they will not disrupt the traffic flow on other t ...

, aligning a junction of two or more transport axes at different heights to facilitate traffic flow *

Cetane rating Cetane number (cetane rating) is an indicator of the combustion speed of diesel fuel and compression needed for ignition. It plays a similar role for diesel as octane rating does for gasoline. The CN is an important factor in determining the ...

, a measure of diesel fuel's combustion quality * Octane rating, also called gasoline grade, the measure of the autoignition resistance of gasoline (petrol) and other fuels used in spark-ignition internal combustion engines *

Grade of service In telecommunication engineering, and in particular teletraffic engineering, the quality of voice service is specified by two measures: the grade of service (GoS) and the quality of service (QoS). Grade of service is the probability of a call in a ...

, the quality of voice service in telecommunications *

Color grading Color grading is a post-production process common to filmmaking and video editing of altering the appearance of an image for presentation in different environments on different devices. Various attributes of an image such as contrast, color, ...

, the process of altering and enhancing the color of a motion picture, video image, or still image * A rating of

lumber Lumber is wood that has been processed into dimensional lumber, including beams and planks or boards, a stage in the process of wood production. Lumber is mainly used for construction framing, as well as finishing (floors, wall panels, w ...

(timber) quality and strength

Mathematics

Grade (angle) In trigonometry, the gradian, also known as the gon (from grc, γωνία, gōnía, angle), grad, or grade, is a unit of measurement of an angle, defined as one hundredth of the right angle; in other words, there are 100 gradians in 90 degr ...

, a unit for the measurement of plane angles *

Graded (mathematics) In mathematics, the term “graded” has a number of meanings, mostly related: In abstract algebra, it refers to a family of concepts: * An algebraic structure X is said to be I-graded for an index set I if it has a gradation or grading, i.e. ...

, with several meanings *

Graded poset In mathematics, in the branch of combinatorics, a graded poset is a partially-ordered set (poset) ''P'' equipped with a rank function ''ρ'' from ''P'' to the set N of all natural numbers. ''ρ'' must satisfy the following two properties: * The ...

, a partially ordered set equipped with a rank function, sometimes called a ranked poset *

Graded vector space In mathematics, a graded vector space is a vector space that has the extra structure of a '' grading'' or a ''gradation'', which is a decomposition of the vector space into a direct sum of vector subspaces. Integer gradation Let \mathbb be ...

, a vector space with an extra piece of structure *

Graded algebra In mathematics, in particular abstract algebra, a graded ring is a ring such that the underlying additive group is a direct sum of abelian groups R_i such that R_i R_j \subseteq R_. The index set is usually the set of nonnegative integers or the ...

, an algebra over a field (or ring) with an extra piece of structure

Linguistics

* Grade, each of the "levels" of

vowel gradation In linguistics, apophony (also known as ablaut, (vowel) gradation, (vowel) mutation, alternation, internal modification, stem modification, stem alternation, replacive morphology, stem mutation, internal inflection etc.) is any Alternation (lin ...

, especially in Indo-European * Grade, or degree, one of the comparative forms of an adjective

Sport

* Grade (climbing), a climber's assessment of the difficulty and danger of climbing a hill * Grade (bouldering), a climber's assessment of the difficulty and danger of climbing a route which are distinct from those used in regular climbing *

Degree of difficulty Degree of difficulty (DD, sometimes called tariff or grade) is a concept used in several sports and other competitions to indicate the technical difficulty of a skill, performance, or course, often as a factor in scoring. Sports which incorporate ...

, in several sports * International Scale of River Difficulty, also called grade, a standardized scale used to rate the safety of a stretch of river, or a single rapid

Other uses

Grade (crime) The grade of a crime is its ranking or classification by its degree or seriousness or severity. A felony is more serious than a misdemeanor, which is more serious than an infraction. A first degree felony is more serious than a second degree felon ...

, the degree of seriousness of a crime *

Military rank Military ranks are a system of hierarchy, hierarchical relationships, within armed forces, police, intelligence agencies or other institutions organized along military lines. The military rank system defines dominance, authority, and responsibi ...

* Grade (surname) (includes a list of people with the name) * Grade, Cornwall, a village in the UK *

Coin grading Coin grading is the process of determining the grade or condition of a coin, one of the key factors in determining its value. A coin's grade is generally determined by six criteria: strike, preservation, luster, color, attractiveness, and occasion ...

, the process of determining the grade or condition of a coin, the key factor in its value *

Food grading Food grading involves the inspection, assessment and sorting of various foods regarding quality, freshness, legal conformity and market value.Saravacos, George D.; Maroulis, Zacharias B. (2011''Food Process Engineering Operations'' CRC Press. ...

, the inspection, assessment and sorting of foods to determine quality, freshness, legal conformity and market value * Pattern grading, the scaling of a pattern to a different size in the clothing or footwear industry