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.
Isaac GRoot is Nvidia’s software for robot brains, running on Jetson Thor hardware.
From Barron's • Jun. 1, 2026
But even if that’s the case, Oscar Isaac, Matthew Rhys and Paul Anthony Kelly should still be among the other nominees.”
From Los Angeles Times • May 19, 2026
Researchers have spent more than 225 years trying to improve measurements of big G since Isaac Newton first described gravity mathematically.
From Science Daily • May 18, 2026
The country has also hosted Israeli President Isaac Herzog several times.
From The Wall Street Journal • May 14, 2026
Isaac also remembered what he called Jefferson’s “copyin’ machine,” or polygraph, which could automatically produce an exact copy of what Jefferson wrote with his own pen.
From "In the Shadow of Liberty" by Kenneth C. Davis
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.
