Dictionary definition · cinch
noun
- any undertaking that is easy to do"marketing this product will be no picnic"
- stable gear consisting of a band around a horse's belly that holds the saddle in place
- a form of all fours in which the players bid for the privilege of naming trumps
verb
- tie a cinch around"cinch horses"
- make sure of
- get a grip on; get mastery of
Source: Open English WordNet (CC BY 4.0).