Definition of "hm" []

• Hectometer (abbreviation)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "And hm, is it a tough call to stop a certain murderer to protect a non-murderer?"
• "BUT he is our president now so I will have to put my faith in hm that he does the right thing."
• "He has expressed surpirse that McCain has called hm that, but he has not deined it."