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[ahy-zuh k] /ˈaɪ zək/
a son of Abraham and Sarah, and father of Jacob. Gen. 21:1–4.
a male given name: from a Hebrew word meaning “laughter.”. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for Isaac
Contemporary Examples
Historical Examples
  • No fear but what Isaac will do well in the world and be a rich man before he dies.

    Biographical Stories Nathaniel Hawthorne
  • Among the officers who came and spoke to us, was an admiral, Sir Isaac Coffin.

    Ned Myers James Fenimore Cooper
  • This remark is exemplified in the history of Isaac and Rebekah.

  • Isaac dropped the goblet he was about to drain, and fell upon his knees.

    Leila, Complete Edward Bulwer-Lytton
  • Isaac knew the temperature of his frames to the twentieth part of a degree.

    The Black Tulip Alexandre Dumas (Pere)
British Dictionary definitions for Isaac


an Old Testament patriarch, the son of Abraham and Sarah and father of Jacob and Esau (Genesis 17; 21–27)
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
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Word Origin and History for Isaac

masc. proper name, name of a biblical patriarch, from Late Latin, from Greek Isaak, from Hebrew Yitzhaq, literally "he laughs," imperf. of tzahaq "he laughed."

Online Etymology Dictionary, © 2010 Douglas Harper
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Isaac in Culture

Isaac definition

The son of Abraham and the father of Jacob and Esau.

Note: Abraham was prepared to sacrifice Isaac at God's request. (See Abraham and Isaac.)
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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