action Meaning in Cambridge American English Dictionary
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Meaning of "action" - American English Dictionary

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actionnoun [C/U]

 us   /ˈæk·ʃən/

action noun [C/U] (SOMETHING DONE)

the process of doing something, or something done, esp. for a particular purpose: [U] Quick action in calling the fire department saved many lives. [C] It was a reckless action which he later came to regret. [+ to infinitive] We want a leader who will take action to fix our problems. [U] Financial advisers urged the city to take action (= do something) to deal with the fiscal crisis. Action is also fighting in a war: [U] Her younger son was killed in action. In an action film/movie, there is usually a lot of violence and many exciting things happen.

action noun [C/U] (MOVEMENT)

the way something moves or works, or the effect it has on something else: [C] The heart’s action in regulating blood flow is critically important.

action noun [C/U] (LEGAL PROCESS)

law a process in a court of law to correct a wrong by which a person or group claims to have been hurt: [C] She brought an action against the hospital for negligence.
(Definition of action from the Cambridge Academic Content Dictionary © Cambridge University Press)
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