°To change the direction of motion after hitting an obstacle.
"The tennis ball bounced off the wall before coming to rest in the ditch."
°To move quickly up and then down, or vice versa, once or repeatedly.
"He bounces nervously on his chair."
noun
°A change of direction of motion after hitting an obstacle.
°A movement up and then down (or vice versa), once or repeatedly.
synonyms:
bounce back, rebound, bob, rebound
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, bob, bobbing, bouncing, ups, mad ups