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1. Fall or diminish
   "The number of students in this course dropped off after the first test"
    
2. Change from a waking to a sleeping state
   "he always drops off during lectures";
   - fall asleep, dope off, flake out, drift off, nod off, doze off, drowse off
    
3. Remove (cargo, people, etc.) from and leave
   "drop off the passengers at the hotel";
   - drop, set down, put down, unload, discharge
    
4. Retreat
   - fall back, fall behind, recede
    
5. Fall to a lower standard
   "My grades are dropping off";
   - slip, drop away, fall away

1. A noticeable deterioration in performance or quality
   "a drop-off in attendance";
   - slump, slack, falloff, falling off
    
2. A steep high face of rock
   "he stood on a high drop-off overlooking the town";
   - cliff, drop
    
3. A change downward
   "there was a sharp drop-off in sales";
   - decrease, lessening

Derived forms: drops off, dropping off, drop-offs, dropped off

See also: fall

Type of: alteration, change, declension, decline, decline in quality, decrease, deliver, deterioration, diminish, fall, formation, geological formation, lessen, modification, regress, retrograde, retrogress, worsen, worsening

Encyclopedia: Drop off