a large, roundish, yellow-skinned, edible citrus fruit having a juicy, acid pulp.
the tropical or semitropical tree, Citrus paradisi, yielding this fruit.

Origin of grapefruit

1805–15; grape + fruit, apparently from the resemblance of its clusters to those of grapes Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for grapefruit

Contemporary Examples of grapefruit

  • There was also the grapefruit diet, the cabbage soup diet, and the cookie diet.

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    Why Your New Year’s Diet Will Fail

    Carrie Arnold

    December 30, 2014

  • Harry Hudson was about to launch a music career when he found a tumor the size of a grapefruit in his chest.

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    When Harry Met Cancer

    Itay Hod

    April 10, 2014

  • That something unexpected was a tumor the size of a grapefruit in his chest.

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    When Harry Met Cancer

    Itay Hod

    April 10, 2014

  • Gripping a stone the size of a grapefruit, he strode toward Ueli Steck, a Swiss climber who had offended him.

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    Breaking Mount Everest’s Glass Ceiling

    Amanda Padoan, Peter Zuckerman

    March 30, 2014

  • Interesting juice choices like a liver detox or kryptonite mix flavors, like carrot and ginger with apple and grapefruit.

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    Gal With a Suitcase

    Jolie Hunt

    February 20, 2011

Historical Examples of grapefruit

British Dictionary definitions for grapefruit


noun plural -fruit or -fruits

a tropical or subtropical cultivated evergreen rutaceous tree, Citrus paradisi
the large round edible fruit of this tree, which has yellow rind and juicy slightly bitter pulp
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 grapefruit

1814, from grape + fruit. So called because it grows in clusters. The fruit itself was known since 1693 (in Hans Sloane's catalogue of Jamaican plants); presumably it originated there from chance hybrids between other cultivated citrus. It was known by various names before the current one emerged. An ornamental plant chiefly at first, not much eaten until late 19c.

Online Etymology Dictionary, © 2010 Douglas Harper