Definition of valid
1
: having legal efficacy or force
especially
: executed with the proper legal authority and formalities
a valid contract
2a
: well-grounded or justifiable : being at once relevant and meaningful
a valid theory
b
: logically correct
a valid argument valid inference
3
: appropriate to the end in view : effective
every craft has its own valid methods
4
of a taxon
: conforming to accepted principles of sound biological classification
Test Your Vocabulary
Great Words for Scrabble
-
- Which of the following Q-without-U words means the number five in cards or dice?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share valid
Time Traveler for valid
The first known use of valid was in 1571
See more words from the same year