Wiktionary
masters-at-arms
n. (master-at-arms English)
WordNet
master-at-arms
n. the senior petty officer; responsible for discipline aboard ship
[also: masters-at-arms (pl)]
masters-at-arms
See master-at-arms
Usage examples of "masters-at-arms".
The boy could be fierce and proud, but the maesters and castellans and masters-at-arms who'd raised him had schooled him well in courtesy.