Definition/Meaning of unless

• English - Conjunction: unless Except on a specified condition; if not . I’m leaving unless I get a pay rise (AmE: raise). 1839 , Denison Olmsted, A Compendium of Astronomy Page 95 Secondly , When a body is once in motion it will continue to move forever , unless something stops it . When a ball is struck on the surface of the earth , the friction of the earth and the resistance of the air soon stop its motion .…
• English - Pronunciation: IPA (key) : /ənˈlɛs/ , /ʌnˈlɛs/ Rhymes: -ɛs
• English - Etymology: onlesse, from on lesse , from "on a less condition" ("on" became un-)
• English - Alternative forms: unlesse ( obsolete )