English Online Dictionary. What means unless? What does unless mean?
English
Alternative forms
- unlesse (obsolete)
- unlessen (US dialect)
Etymology
From Middle English unlesse, earlier on lesse (modern on + less), from (not) on lesse (than) (“(not) on a less compelling condition (than)”). The quality of negation in the word and the lack of stress changed on to un-.
Pronunciation
- IPA(key): /ənˈlɛs/, /ʌnˈlɛs/
- (Northern England) IPA(key): /ʊnˈlɛs/
- (US, nonstandard) IPA(key): /ɪnˈlɛs/
- Rhymes: -ɛs
Conjunction
unless
- Except on a specified condition; if not.
- I’m leaving unless I get a pay rise.
- You can't go out unless it stops raining.
- If not; used with counterfactual conditionals.
- 1159, John of Salisbury, Policraticus, edited by Cary J. Nederman, Cambridge University Press, 1990, page 3 (Google Books view):
- Who would know of Alexander or Caesar, or would respect the Stoics or the Peripatetics, unless they had been distinguished by the memorials of writers?
- 1867, William Robinson Pirie, Natural Theology: An Inquiry Into the Fundamental Principles of Religious, Moral, and Political Science, page 75 (Google Books view):
- Unless He were omnipotent, we could not be sure of His ability to bless us.
- 1159, John of Salisbury, Policraticus, edited by Cary J. Nederman, Cambridge University Press, 1990, page 3 (Google Books view):
- Except if; used with hypothetical conditionals.
- 1809, The Naval Chronicle for 1809: Containing a General and Biographical History of the Royal Navy of the United Kingdom with a Variety of Original Papers on Nautical Subjects. Vol. XXII. (from July to December), Cambridge University Press, 2010, page 482 (Google Books view):
- Q. If Lieutenant P. had given the word "Fire," would you have fired, and at what?—A. I should not have known, unless he had told me what to fire at.
- 1981, Arthur C. Danto, The Transfiguration of the Commonplace: A Philosophy of Art, page 118 (Google Books view):
- Suppose Breugel had done the whole painting with no legs. Then, titled as it is, it would be mystifying, unless someone were to say: the boy has fallen in the waters and they have closed over him, calm is restored, life goes on (as in The Israelites Crossing the Red Sea).
- 1809, The Naval Chronicle for 1809: Containing a General and Biographical History of the Royal Navy of the United Kingdom with a Variety of Original Papers on Nautical Subjects. Vol. XXII. (from July to December), Cambridge University Press, 2010, page 482 (Google Books view):
Antonyms
- (antonym(s) of “except on a condition”): if
Derived terms
- precisely unless
- unlesss
- unless and until, until and unless