The Collaborative International Dictionary of English v.0.48:
Serjeant \Ser"jeant\, Serjeantcy \Ser"jeant*cy\, etc. See Sergeant, Sergeantcy, etc. [1913 Webster] Serjeant-at-arms. See Sergeant-at-arms, under Sergeant. [1913 Webster]WordNet (r) 3.0 (2006):
serjeant-at-arms n 1: an officer (as of a legislature or court) who maintains order and executes commands [syn: sergeant at arms, serjeant-at-arms]