'Messmate' definitions:

Definition of 'messmate'

From: WordNet
noun
(nautical) an associate with whom you share meals in the same mess (as on a ship)

Definition of 'Messmate'

From: GCIDE
  • Messmate \Mess"mate`\, n. An associate in a mess. [1913 Webster]

Synonyms of 'messmate'

From: Moby Thesaurus