What does submarine mean?
submarine
Plural: submarines
Synonyms: sub
Definition
A ship that can travel under the water, used mostly by navies.
Example sentences
From the cliff we watched the submarine dive until only the periscope was showing, then nothing at all.
A sub surfaced right in the middle of the bay last summer, and half the beach thought it was a whale.
My cousin's on a submarine that patrols the North Atlantic — he can go two months without phoning home.