From Longman Dictionary of Contemporary Englishone-timeˈone-time adjective [only before noun] BEFOREformer Neil McMurtry, a one-time bus driver, is the lead singer.
Examples from the Corpus
one-time• The bonds are callable after one year on a one-time basis only.• There is a one-time charge of $ 5.• His father is a prominent attorney and one-time doubles partner of George Bush.• The one-time gifted student kept his hands in his pockets as he listened to the brief proceedings.• It gets its name because of the one-time importance of the weaving industry in the area.• The Ostrich first came to fame through the nefarious exploits of its one-time landlord, Jarman.• He later attempted such elucidation, as did other philosophers, notably his one-time pupil Edmund Husserl.• The housekeeping couple at Cooper's one-time residence on Sixty-first Street were quiet and discreet.From Longman Business Dictionaryone-timeˈone-time (also one-off British English) adjective [only before a noun] a one-time event, payment etc happens once and is not part of a regular series of such eventsLawyers face a one-off tax hit as a result of the tax changes.The company expects to take a one-time charge of $10.3 million (=show it in its accounts) due primarily to restructuring. 