sure bet meaning, definition, English dictionary, synonym, see also 'for sure',sure enough',sure thing',make sure', Reverso dictionary, English simple definition. An expression originating in North America and indicating certainty or confirmation. It is an alternative form of: naturally, of course, sure, sure. sure bet. Define ; Relate; List; Discuss; See; Hear; unLove Support. Help support Wordnik (and make this page ad-free) by adopting the word sure bet here. More from Idioms and phrases. Of course, this land will become valuable in a few years. Free Tools For surfers: Contact FAQ Help News Affiliate Program Twitter XML English. Most popular in the world. One for the ladies.