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To hop, jump, or stand up very quickly or suddenly. The child was leaping up trying to get her kite down from the tree. He leapt up from his chair in alarm when he heard the back door open. The cat leaped up and snatched the bird out of the air.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
to jump upwards. The dog leapt up and licked my cheek. I leapt up so I could see over the wall for just a second.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.