Definition of significant other
: a person who is important to one's well-being
especially
: a spouse or one in a similar relationship
Test Your Vocabulary
Odd Habits and Quirks
-
- Which of the following best describes an easily irritated person?

Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share significant other
Time Traveler for significant other
The first known use of significant other was in 1940
See more words from the same year