Definition of unless in English:


Line breaks: un¦less
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.

Definition of unless in: