Definition of storm trooper in US English:

storm trooper

noun

  • 1A soldier trained specially for carrying out a sudden assault.

    ‘a small crew surrounded by riot-geared storm troopers’
    1. 1.1historical A member of the Nazi political militia.
      ‘Nazi storm troopers stormed the offices of the trade unions’
    2. 1.2 A vigorous advocate or defender of a cause.
      ‘the storm troopers of political correctness’

Pronunciation

storm trooper

/ˈstôrm ˌtro͞opər/