Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
man-at-arms is a noun meaning "a heavily armed and mounted soldier in medieval times". It carries one recorded sense.
a heavily armed and mounted soldier in medieval times
Definitions, synonyms and semantic relations for man-at-arms come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.