'activate' definitions:

Definition of 'activate'

From: WordNet
verb
Put in motion or move to act; "trigger a reaction"; "actuate the circuits" [syn: trip, actuate, trigger, activate, set off, spark off, spark, trigger off, touch off]
verb
Make active or more active; "activate an old file" [ant: deactivate, inactivate]
verb
Make more adsorptive; "activate a metal"
verb
Aerate (sewage) so as to favor the growth of organisms that decompose organic matter [syn: activate, aerate]
verb
Make (substances) radioactive