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activate (v.)

1620s, "make active, intensify;" see active + -ate (2). Meaning "put into action" is from 1902, originally in chemistry. Related: Activated; activating.

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Definitions of activate from WordNet

activate (v.)
put in motion or move to act;
Synonyms: trip / actuate / trigger / set off / spark off / spark / trigger off / touch off
activate (v.)
make active or more active;
activate an old file
activate (v.)
make more adsorptive;
activate a metal
activate (v.)
aerate (sewage) so as to favor the growth of organisms that decompose organic matter;
Synonyms: aerate
activate (v.)
make (substances) radioactive;
From wordnet.princeton.edu