Dictionary.com
Thesaurus.com

Isaac

American  
[ahy-zuhk] / ˈaɪ zək /

noun

  1. (in the Bible) a son of Abraham and Sarah, and the father of Jacob.

  2. a male given name: from a Hebrew word meaning “laughter.”


Isaac British  
/ ˈaɪzək /

noun

  1. 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

Isaac Cultural  
  1. The son of Abraham and the father of Jacob and Esau.


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

O'Neill has had to rebuild his squad since his return with younger players such as Conor Bradley, Shea Charles and Isaac Price becoming key figures in the promising team.

From BBC • May 27, 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

Isaac gently asks if he can have the honor of carrying the Torah for a while, and Father passes it to him.

From "Across So Many Seas" by Ruth Behar

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "Isaac" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com