GNU Collaborative International Dictionary of English

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Found one definition

1.       
   leprechaun n. (Irish folklore)  A small mischevous elf or spirit in Irish folklore; it is often depicted in literature as a dwarfish bearded old man; -- legend tells that if a leprechaun is captured, he will reveal the location of his hidden pot of gold.
   
   [WordNet 1.5 +PJC]