Definition of unless in English:

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Pronunciation: /ʌnˈlɛs/


Except if (used to introduce the case in which a statement being made is not true or valid): unless you have a photographic memory, repetition is vital manuscripts cannot be returned unless accompanied by a self-addressed envelope
More example sentences
  • Now how would we know that unless we actually had that dialogue which you commend?
  • It was now to be the sole means of pursuing a claim, unless you're extremely wealthy.
  • The tags remain active after they have left the store, unless they are switched off.


Late Middle English: from on or in (assimilated through lack of stress to un-1) + less.

For editors and proofreaders

Line breaks: un¦less

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