[waw-ter-mel-uh n, wot-er-]
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  1. the large, roundish or elongated fruit of a trailing vine, Citrullus lanata, of the gourd family, having a hard, green rind and a sweet, juicy, usually pink or red pulp.
  2. the vine itself.

Origin of watermelon

First recorded in 1605–15; water + melon
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for watermelon


  1. an African melon, Citrullus vulgaris, widely cultivated for its large edible fruit
  2. the fruit of this plant, which has a hard green rind and sweet watery reddish flesh
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for watermelon

1610s, from water (n.1) + melon. So called for being full of thin juice. Cf. French melon d'eau.

Online Etymology Dictionary, © 2010 Douglas Harper