A person or thing that is acting or capable of acting. / (electronics) Any component that is not passive. See Passivity (engineering).

(transitive) To encourage development or induce increased activity; to stimulate.

plural of activity

In an active manner. / (grammar) In the active form; not passive.

Third-person singular simple present indicative form of activate

The practice of using action to achieve a result, such as political demonstration or a strike in support of or in opposition to an issue.

simple past tense and past participle of activate

One who, or that which, activates. / (chemistry) Something that activates a catalyst / (biology) Any chemical or agent which regulates one or more genes by increasing the rate of transcription.

The state or quality of being active.

plural of activation