Definition of RSM in English:

RSM

Line breaks: RSM

abbreviation

1(In the British army) Regimental Sergeant Major.
1.1San Marino (international vehicle registration).
[from Italian Repubblica di San Marino]

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day bouffant
Pronunciation: bo͞oˈfänt
adjective
styled to puff out in a rounded shape...