Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

unless

play
conjunction un·less \ən-ˈles, ˈən-ˌ\

Simple Definition of unless

  • —used to say what will happen, be done, or be true if something else does not happen, is not done, or is not true

Source: Merriam-Webster's Learner's Dictionary

Full Definition of unless

  1. 1 :  except on the condition that :  under any other circumstance than

  2. 2 :  without the accompanying circumstance or condition that :  but that :  but


2

unless

preposition un·less

Definition of unless

  1. :  except possibly :  except



Circa 1532

First Known Use of unless

circa 1532



UNLESS Defined for Kids

unless

play
conjunction un·less \ən-ˈles\

Definition of unless for Students

  1. :  except on the condition that <You can't have dessert unless you finish your dinner.>





Seen and Heard

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

WORD OF THE DAY

a timid, meek, or unassertive person

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

soothe reduce perplex disapprove
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