(n) a change downward, Syn. drop-off, lessening, Ant. increase, Example:there was a decrease in his temperature as the fever subsided; there was a sharp drop-off in sales
(n) a noticeable deterioration in performance or quality, Syn. drop-off, falloff, slack, falling off, Example:the team went into a slump; a gradual slack in output; a drop-off in attendance; a falloff in quality