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activate Syllabification: ac·ti·vate
Pronunciation: /ˈaktəˌvāt/

Definition of activate in English:


[with object]
1Make (something) active or operative: fumes from cooking are enough to activate the alarm
More example sentences
  • Now, the state has activated its emergency operation center, saying at a level of one to five, it is now at a level of three.
  • The component also enables the operator to set tolerance limits for important operating parameters, and activates an alarm when deviation from these ranges occurs.
  • This was the day the GSM operator activated its network and started selling prepaid cards to individual customers.
operate, switch on, turn on, start (up), set going, trigger (off), set in motion, initiate, actuate, energize;
1.1Convert (a substance, molecule, etc.) into a reactive form: (as adjective activated) activated chlorine
More example sentences
  • The energy that is required to activate molecules for a chemical reaction is the activation energy of the reaction.
  • This molecule activates enzymes and other substances to help move fat out of fat cells and deliver it to active tissues (such as muscle fibers) that will burn it as fuel.
  • The specific biochemical reaction to glucagon involves activating a particular enzyme.


Pronunciation: /ˈaktəˌvādər/
Example sentences
  • You're a kick in the pants, an inspirer, an activator - people love being friends with you because you're full of energy and fun ideas.
  • Those 21 strains that grew on AT in the presence of LexA were rejected because the suppression could have been due to mutations that potentiate weak activators.
  • Repressors stifle gene expression by blocking the binding of activators, interfering with their recruiting efforts, or smothering the DNA in more protein.
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