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.”

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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)

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Isaac Cultural  

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

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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:

• Ishmael vs. Isaac

Example Sentences

The news weighed on Fair Isaac shares: Since March 6, the final trading day before the credit bureaus announced the price cuts, Fair Isaac stock is 26% lower, according to Dow Jones Market Data.

From Barron's • Apr. 7, 2026

Israeli President Isaac Herzog said he had called Cardinal Pizzaballa to express his "great sorrow" over the "unfortunate incident".

From BBC • Mar. 29, 2026

As Isaac Asimov observed, “There is a cult of ignorance in the United States, and there has always been.”

From Salon • Mar. 28, 2026

Cinematographer Isaac Bauman’s eye never stops moving — an independent narrator telling a different story than the one starring our heroine.

From Los Angeles Times • Mar. 26, 2026

The sisters spent the night at Isaac and Amy Post’s home, which had been a place of safety for so many others.

From "American Spirits" by Barb Rosenstock