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second lieutenant (plural second lieutenants)

  1. The lowest rank of a commissioned army officer, below a lieutenant.
  2. The lowest rank of a commissioned officer in the United States Army, United States Air Force, or United States Marine Corps, below a first lieutenant. The rank of second lieutenant is equivalent to the naval rank of ensign.

Usage notesEdit

When used as a title, it is always capitalized.

Example: Second Lieutenant Jane Doe.

The rank corresponds to pay grade O-1. Abbreviations: 2LT (Army), 2ndLt (Marine Corps), 2d Lt (Air Force).


  • ensign (traditional infantry lowest commission officer rank)
  • coronet (traditional cavalry lowest commission officer rank)

Coordinate termsEdit

(rank under lieutenant):