Isaac
Americannoun
-
(in the Bible) a son of Abraham and Sarah, and the father of Jacob.
-
a male given name: from a Hebrew word meaning “laughter.”
noun
Discover More
Abraham was prepared to sacrifice Isaac at God's request. (See Abraham and Isaac.)
Compare meaning
How does isaac compare to similar and commonly confused words? Explore the most common comparisons:
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
On a cold November morning, designer Isaac Mizrahi gets up, leaves his apartment, and trudges to the corner newsstand to pick up a copy of Women’s Wear Daily.
From Salon ● Sep. 5, 2026
It also helps Stanmore avoid up to US$60 million in deferred and contingent acquisition payments that would be owing once the Isaac Downs Extension is developed, the broker says.
From The Wall Street Journal ● Sep. 4, 2026
Israeli President Isaac Herzog hailed the "loyalty and devotion" of Harald, who early in his reign supported the landmark Oslo Accords between Israel and the Palestinians.
From Barron's ● Aug. 28, 2026
Byron’s son, Isaac, played tight end at San Clemente and BYU, and another son, Preston, is a senior running back at BYU.
From Los Angeles Times ● Aug. 26, 2026
Isaac Post found a new kind of mediumship, no rapping needed.
From "American Spirits" by Barb Rosenstock
![]()
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.