seaman

Short definition from Wiktionary

Noun

1. 1
   Synonym of sailor, particularly on a maritime vessel.
2. 2
   A person of the lowest rank in the Navy, below able seaman.
3. 3
   An enlisted rate in the United States Navy and United States Coast Guard, ranking below petty officer third class and above seaman apprentice.
4. 4
   A merman; the male of the mermaid.

Proper noun

1. 1
   A surname originating as an occupation.
2. 2
   A village in Scott Township, Adams County, Ohio, United States, named after the Seaman family.