Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
serjeant-at-arms is a noun meaning "an officer (as of a legislature or court) who maintains order and executes commands". It carries one recorded sense.
an officer (as of a legislature or court) who maintains order and executes commands
legislature
Definitions, synonyms and semantic relations for serjeant-at-arms come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.