Active

Active may refer to:

Music

 * Active (album), a 1992 album by Casiopea
 * Active Records, a record label

Ships

 * 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

Sciences

 * Thermodynamic activity, measure of an effective concentration of a species in a mixture.
 * Activation, 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

Other

 * 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