Meaning of “buckle up” in the English Dictionary

american-english dictionary

"buckle up" in British English

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buckle up

phrasal verb with buckle uk /ˈbʌk.əl/ us /ˈbʌk.əl/ verb

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

"buckle up" in American English

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buckle up

phrasal verb with buckle us /ˈbʌk·əl/ verb [ I/T ]

to fasten your seat belt (= belt attached to a seat):

We believe in safe driving, buckling up, and observing the speed limit.

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