Definition of assuming

: having or showing the attitude of someone who assumes something that should not be assumed : pretentious, presumptuous … I caught him boasting … about how popular he had become. Oh well, he could have been joking only, but to me I find it very assuming of him.— Ryan Mark "When there are conversations centering around sexual assault, they tend to be very assuming of heterosexual dynamics."— Justice Gaines When speaking about newly signed left guard Andrew Norwell, [Tom] Coughlin was quick to speak in a very assuming way of how this offense is going to play.— Ryan Day

First Known Use of assuming

1667, in the meaning defined above

Keep scrolling for more

Learn More about assuming

Statistics for assuming

Last Updated

23 Apr 2019

Look-up Popularity

Time Traveler for assuming

The first known use of assuming was in 1667

See more words from the same year

More from Merriam-Webster on assuming

Nglish: Translation of assuming for Spanish Speakers

Britannica English: Translation of assuming for Arabic Speakers

Comments on assuming

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


behavior toward others

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!