hm -abbr
- hectometer
HM -abbr
- Her Majesty; Her Majesty's; His Majesty; His Majesty's
HMAS -abbr
- Her Majesty's Australian ship; His Majesty's Australian ship
HMCS -abbr
- Her Majesty's Canadian ship; His Majesty's Canadian ship
HMO [,āch-(,)em-'ō] -n
- an organization that provides comprehensive health care to voluntarily enrolled individuals and families in a particular geographic area by member physicians with limited referral to outside specialists and that is financed by fixed periodic payments determined in advance called also health maintenance organization
Hmong ['məŋ] -n
- a member of a mountain-dwelling people inhabiting southeastern China and the northern parts of Vietnam, Laos, and Thailand
- the language of the Hmong people
HMS -abbr
- Her Majesty's ship; His Majesty's ship