Quick definitions from Macmillan ( )

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Quick definitions from WordNet (bump)

▸ noun:  an impact (as from a collision) ("The bump threw him off the bicycle")
▸ noun:  a lump on the body caused by a blow
▸ noun:  something that bulges out or is protuberant or projects from a form
▸ verb:  knock against with force or violence ("My car bumped into the tree")
▸ verb:  dance erotically or dance with the pelvis thrust forward ("Bump and grind")
▸ verb:  assign to a lower position; reduce in rank
▸ verb:  remove or force from a position of dwelling previously occupied
▸ verb:  come upon, as if by accident; meet with
▸ name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #6982)

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▸ Word origin