Reentrant or re-entrant can refer to: *

Re-entrant (landform) A re-entrant (international) or draw or is a terrain feature formed by two parallel ridges or spurs with low ground in between them. The area of low ground itself is the draw, and it is defined by the spurs surrounding it. Re-entrants are simil ...

, the low ground formed between two hill spurs. *

Reentrancy (computing) In computing, a computer program or subroutine is called reentrant if multiple invocations can safely run concurrently on multiple processors, or on a single processor system, where a reentrant procedure can be interrupted in the middle of its e ...

in computer programming * Reentrant mutex in computer science *

Reentry (neural circuitry) Reentry is a Biological neural network, neural structuring of the brain, which is characterized by the ongoing bidirectional exchange of signals along reciprocal axonal fibers linking two or more brain areas. It is hypothesized to allow for widely ...

in neuroscience *

Salients, re-entrants and pockets A salient, also known as a bulge, is a battlefield feature that projects into enemy territory. The salient is surrounded by the enemy on multiple sides, making the troops occupying the salient vulnerable. The opponent's front line that borders a ...

in military tactics *

Reentrant tuning On a stringed instrument, a break in an otherwise ascending (or descending) order of string pitches is known as a re-entry. A re-entrant tuning, therefore, is a tuning where the strings (or more properly the courses) are not all ordered from th ...

in music *

Concave polygon A simple polygon that is not convex is called concave, non-convex or reentrant. A concave polygon will always have at least one reflex interior angle—that is, an angle with a measure that is between 180 degrees and 360 degrees exclusive. Pol ...

, AKA reentrant polygon

See also