sergeant major

  1. U.S. Army, Air Force, and Marine Corps. a noncommissioned officer serving as chief administrative assistant in a unit headquarters.

  2. U.S. Marine Corps. a noncommissioned officer ranking above a first sergeant.

  1. a small damselfish, Abudefduf saxatilis, inhabiting warm Atlantic waters, having vertical black stripes on each side.

Origin of sergeant major

First recorded in 1565–75

Words Nearby sergeant major Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use sergeant major in a sentence

British Dictionary definitions for sergeant major

sergeant major

  1. a noncommissioned officer of the highest rank or having specific administrative tasks in branches of the armed forces of various countries

  2. a large damselfish, Abudefduf saxatilis, having a bluish-grey body marked with black stripes

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