Simple Definition of wag

from our Learner's Dictionary

wag

1 of 3

verb

wags; wagged; wagging
: to move something from side to side repeatedly
The dog wagged its tail.
She wagged her finger at the children as she scolded them.
He wagged his head back and forth.
The dog's tail began to wag excitedly.

wag

2 of 3

noun

plural wags
: a movement from side to side : a wagging movement
He answered with a wag of his head/finger.
the wag of a dog's tail

wag

3 of 3

noun

plural wags
old-fashioned : a clever person who makes lots of jokes : joker
He was known as quite a wag.

Cite this Entry

“Wag.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/wag. Accessed 20 Jun. 2026.

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