Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

1

yawn

play
intransitive verb \ˈyȯn, ˈyän\

Medical Definition of yawn

  1. :  to open the mouth wide and take a deep breath usually as an involuntary reaction to fatigue or boredom




2

yawn

noun

Medical Definition of yawn

  1. :  an opening of the mouth wide while taking a deep breath often as an involuntary reaction to fatigue or boredom





Seen and Heard

What made you want to look up yawn? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

immature or lacking adult sophistication

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

prompt maudlin oily angry
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ