Active may refer to:
* ''Active'' (album)
, a 1992 album by Casiopea
* Active Records
, a record label
* ''Active'' (ship)
, several commercial ships by that name
* HMS ''Active''
, the name of various ships of the British Royal Navy
* USCS ''Active''
, a US Coast Survey ship in commission from 1852 to 1861
* USCGC ''Active''
, the name of various ships of the US Coast Guard
* USRC ''Active''
, the name of various ships of the US Revenue Cutter Service
* USS ''Active''
, the name of various ships of the US Navy
Computers and electronics
* Active Enterprises
, a defunct video game developer
* Sky Active
, the brand name for interactive features on Sky Digital available in the UK and Ireland
* Active (software)
, software used for open publishing by Indymedia; see Independent Media Center
* Thermodynamic activity
, measure of an effective concentration of a species in a mixture.
, in chemistry the process whereby something is prepared for a subsequent reaction
* Active (pharmacology)
, the fraction of a dose of unchanged drug that reaches systemic circulation
* Active, Alabama
, a community in the US
* ''Active'', the original name of the early steam locomotive ''Locomotion'' No. 1
* "Actives", current members of fraternities and sororities
* Active living
, a lifestyle characterized by frequent or various activities
* Activity (disambiguation)
* Passive (disambiguation)