A small mound of loose earth raised by a burrowing mole.(noun)
Make a mountain out of a molehill To exaggerate a minor problem.(idiom)
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.
Use "molehill" in a sentence
"As I said, the policy may be ineffectual and, therefore, misguided, but criticism that makes a mountain out of a molehill is also misguided."
"The difference between a mountain and a molehill is your perspective."
"In this fight, the Clinton camp is the more aggressive of the two, and it's adept at what might be called molehill politics: making a very big deal in the press about something that's a very small deal — such as a single word in a mailing or a slip-up by an aide."