\ ˈī-zik
, -zək \
, -zək \
Definition of Isaac
in the Bible
: the son of Abraham and father of Jacob according to the account in Genesis
Learn More About Isaac
Statistics for Isaac
Look-up Popularity
Cite this Entry
“Isaac.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Isaac. Accessed 22 May. 2022.
Style: MLA
MLA
Chicago
APA
Merriam-Webster
Chicago
APA
Merriam-Webster
Test Your Vocabulary
Name That Food
-
- Name these cookies!
Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
-
You're (Probably) Saying It Wrong
18 words even you might be mispronouncing
-
Great Big List of Beautiful & Useless Words
Along with their degrees of usefulness
-
12 French Phrases from Downton Abbey
Many of us have an 'idée fixe'
-
Words For Things You Didn't Know Have Names
When 'thingamajig' and 'thingamabob' just won't do
Ask the Editors
Word Games
-
The Great British Vocabulary Quiz
Make sure you know the difference between a loo a...
Take the quiz
-
Face Your Fears
Don't be scared to answer these questions about f...
Take the quiz
-
Yearbook Superlatives Quiz
"Most Likely to Use Obscure Words"
Take the quiz
-
Lexigo
Find the hidden words by solving the clues
Take the quiz
Share Isaac
Time Traveler for Isaac
The first known use of Isaac was before the 12th century
See more words from the same century