'Molehill' definitions:

Definition of 'molehill'

From: WordNet
noun
A mound of earth made by moles while burrowing

Definition of 'Molehill'

From: GCIDE
  • Molehill \Mole"hill`\, n. A little hillock of earth thrown up by moles working under ground; hence, a very small hill, or an insignificant obstacle or difficulty; as, to make a mountain out of a molehill. [1913 Webster]
  • Having leapt over such mountains, lie down before a molehill. --South. [1913 Webster] mMolendinaceous