A noticeable deterioration in performance or quality. Synonyms:falling off, falloff, slack, slump."A gradual slack in output" , "A drop-off in attendance" , "A falloff in quality"
2.
A steep high face of rock. Synonyms:cliff, drop."A steep drop"
3.
A change downward. Synonyms:decrease, lessening."There was a sharp drop-off in sales"Antonym:increase.
