Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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activate

ac·ti·vate

activate

 
pronunciation:
aek t veIt
features:
Word Combinations (verb), Word Parts
part of speech: transitive verb
inflections: activated, activates, activating
definition 1: to initiate action in; make active.
This button activates the wind machine.
See a movie for this meaning
See a movie for this meaning
 
synonyms:
actuate, energize, start, stimulate
antonyms:
arrest, halt, inhibit, stop
similar words:
arouse, commence, compel, drive, excite, ignite, impel, induce, initiate, inspire, kindle, motivate, prod, propel, trigger, trip, vitalize
definition 2: in chemistry, to make more reactive, as by heating.
antonyms:
inhibit
similar words:
catalyze, hasten, stimulate, volatilize
definition 3: to assign (a military unit) to active status.
synonyms:
assign, ready
antonyms:
deactivate
similar words:
appoint, call, engage, mobilize, post, prepare, summon
definition 4: in physics, to cause radioactive properties in (a substance).
similar words:
excite, irradiate, x-ray
definition 5: to cause decomposition in (sewage) by aerating.
synonyms:
aerate, oxygenate
similar words:
air, charge, decompose, ventilate
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derivation: activation (n.)
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