The meaning of the Acronym HM is...

HM is

• History Makers
• Head Madam
• HeadMaster

More Meanings For HM:

• Help Machine
• Howdy Mike
• Hydrography and Meteorology
• High Modulation
• Hot Mama
• Honorable Mention
• Horrible Males
• HumorMaster
• HektoMetre
• Honourable Mention
• Harare Municipality
• Helmineron Military
• Highly Magnified
• Homology Manifold
• Highly Migratory

HM is also in:

• Academic Degrees
• Adults
• Awards & Medals
• Chat
• Electronics
• Funnies
• Software
• Toastmasters
• Unfiled
• Unit Measures