Activate - Definition

v 1: 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]
2: make active or more active; "activate an old file" [ant:
deactivate, inactivate]
3: make more adsorptive; "activate a metal"
4: aerate (sewage) so as to favor the growth of organisms that
decompose organic matter [syn: activate, aerate]
5: make (substances) radioactive