Definition of conjunction
1
: an uninflected linguistic form that joins together sentences, clauses, phrases, or words
Some common conjunctions are "and," "but," and "although."
2
: the act or an instance of conjoining : the state of being conjoined : combination
working in conjunction with state and local authorities
3
: occurrence together in time or space : concurrence
a conjunction of events
4a
: the apparent meeting or passing of two or more celestial bodies in the same degree of the zodiac
b
: a configuration in which two celestial bodies have their least apparent separation
a conjunction of Mars and Jupiter
5
: a complex sentence in logic true if and only if each of its components is true — see Truth Table
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Buying Guide
Check out the 11 best games for word lovers from our Reviews team.
Test Your Vocabulary
Which Word Does Not Belong?
-
- Which of these words does not mean "nonsense"?

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
Share conjunction
Time Traveler for conjunction
The first known use of conjunction was in the 14th century
See more words from the same century