What does "second lieutenant" mean?

The lowest rank of a commissioned army officer, below a lieutenant.

What is a synonym for "second lieutenant"?

Common synonyms include: 2nd lieutenant, cornets, coronet, ensign.

noun

noun ·Rare ·Advanced level

Noun

1
The lowest rank of a commissioned army officer, below a lieutenant.
2
a commissioned officer in the Army or Air Force or Marine Corps holding the lowest rank wordnet
3
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.