a native or inhabitant of the United States.

a native or inhabitant of New England.

a native or inhabitant of a northern U.S. state, esp. of one of the northeastern states that sided with the Union in the American Civil War.

a federal or northern soldier in the American Civil War.

a word used in communications to represent the letter Y.

Military . the NATO name for a class of Soviet ballistic missile submarine, nuclear powered, with up to 16 missile launchers.

of, pertaining to, or characteristic of a Yankee or Yankees

Yankee ingenuity.