Definition of “open season” - English Dictionary

british dictionary

“open season” in American English

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open seasonnoun [ C usually sing ]

us /ˈoʊ·pən ˈsi·zən/

the period in the year when it is legal to hunt particular animals:

If wolves are taken off the endangered list, does that mean it's open season for hunters?
fig. The mayor has declared open season on jaywalkers.

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