Definition of 'buck'

Noun

1. a gymnastic horse without pommels and with one end elongated; used lengthwise for vaulting
      Synonyms: vaulting horse long horse
2. a piece of paper money worth one dollar
      Synonyms: dollar dollar bill one dollar bill clam
3. United States author whose novels drew on her experiences as a missionary in China (1892-1973)
      Synonyms: Pearl Buck Pearl Sydenstricker Buck
4. a framework for holding wood that is being sawed
      Synonyms: sawhorse horse sawbuck
5. mature male of various mammals (especially deer or antelope)

Verb

1. to strive with determination; "John is bucking for a promotion"
2. resist; "buck the trend"
      Synonyms: go against
3. move quickly and violently; "The car tore down the street"; "He came charging into my office"
      Synonyms: tear shoot shoot down charge
4. jump vertically, with legs stiff and back arched; "the yung filly bucked"
      Synonyms: jerk hitch

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