n. 1. a noticeable decline in performance; as, a drop-off in attendance. [ wns=1 ] Syn. -- slump, falloff, falling off. [ WordNet 1.5 ]
2. a steep high face of rock. Syn. -- cliff. [ wns=2 ] [ WordNet 1.5 ]
3. a change downward; as, there was a sharp drop-off in sales. [ wns=3 ] Syn. -- decrease, lessening. [ WordNet 1.5 ]