„Without a single time.” Merriam-Webster.com thesaurus, Merriam-Webster, www.merriam-webster.com/thesaurus/one-off. Access 14 Dec 2020. What made you look more and more? Please tell us where you read or heard it (including the quote, if possible). Subscribe to America`s largest dictionary and get thousands of other definitions and advanced search – ad-free!.