American English

Definition of vanguard noun from the Oxford Advanced American Dictionary



    the vanguard [singular]
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  1. 1the leaders of a movement in society, for example in politics, art, industry, etc. The company is proud to be in the vanguard of scientific progress. The party claimed to be the vanguard of the world revolutionary movement.
  2. 2the part of an army, etc. that is at the front when moving forward to attack the enemy The army was advancing steadily and the vanguard was already at the border. opposite rearguard
See the Oxford Advanced Learner's Dictionary entry: vanguard