- 1 [intransitive] (of a horse) to jump with the two back feet or all four feet off the ground
- 2[intransitive] to move up and down suddenly or in a way that is not controlled The boat bucked and heaved beneath them. The shotgun bucked in his hands.
- 3 [transitive] buck something (informal) to resist or oppose something One or two companies have managed to buck the trend of the recession. He admired her willingness to buck the system (= oppose authority or rules). The president is unlikely to buck pressure from the public. Phrasal Verbsbuck upbuck somebody up
NAmE//bʌk//Verb Forms present simple I / you / we / they buck
he / she / it bucks
past simple bucked
-ing form bucking