#1 Buck v. [buck] to strive with determination; "John is bucking for a promotion". wn #2 Buck n. [vaulting horse, long horse, buck] a gymnastic horse without pommels and with one end elongated; used lengthwise for vaulting. wn #3 Buck v. [buck, go against] resist; "buck the trend". wn #4 Buck n. [dollar, dollar bill, one dollar bill, buck, clam] a piece of paper money worth one dollar. wn #5 Buck n. [Pearl Buck, Pearl Sydenstricker Buck] United States author whose novels drew on her experiences as a missionary in China (1892-1973). wn