Cliff \c-li-ff\ as a boy's name is of Old English origin, and the meaning of Cliff is "cliff-side slope". Diminutive of Clifford and Clifton. Sometimes linked with Clive. Made popular in the 1950s by pop singer Cliff Richard. Actor Cliff Robertson.
Cliff has 3 variant forms: Cliffe, Clyff and Clyffe.
Baby names that sound like Cliff are Cleve and Clyve.