HM
abbreviation
1- headmaster or headmistress.同 headmaster或 headmistress.
1.1
- Brit. heavy metal (music)〈英〉重金属（音乐）。
1.2
- (in the UK) Her (or His) Majesty('s)（英国）陛下：
HM Forces.
女王陛下的军队。