Meaning of “aggression” in the English Dictionary

british dictionary

"aggression" in British English

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aggressionnoun [ U ]

uk /əˈɡreʃ.ən/ us /əˈɡreʃ.ən/

C1 spoken or physical behaviour that is threatening or involves harm to someone or something:

Some types of dog are bred for aggression.
an act of aggression

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(Definition of “aggression” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"aggression" in American English

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aggressionnoun [ U ]

us /əˈɡreʃ·ən/

actions or behavior that use threats or force against others:

We regard the presence of troops on our border as an act of aggression.

(Definition of “aggression” from the Cambridge Academic Content Dictionary © Cambridge University Press)