surefire

[ shoor-fahyuhr, shur- ]
See synonyms for surefire on Thesaurus.com
adjective
  1. sure to work; foolproof: a surefire moneymaking scheme.

Origin of surefire

1
First recorded in 1915–20; sure + fire

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use surefire in a sentence

British Dictionary definitions for sure-fire

sure-fire

adjective
  1. (usually prenominal) informal certain to succeed or meet expectations; assured

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012