Noun drop off has 3 senses
  1. slump, slack, drop-off, falloff, falling off - a noticeable deterioration in performance or quality; "the team went into a slump"; "a gradual slack in output"; "a drop-off in attendance"; "a falloff in quality"
    --1 is a kind of deterioration, decline in quality, declension, worsening
    Derived form: verb drop off4
  2. cliff, drop, drop-off - a steep high face of rock; "he stood on a high cliff overlooking the town"; "a steep drop"
    --2 is a kind of geological formation, formation
    --2 has particulars: crag; precipice
  3. decrease, lessening, drop-off - a change downward; "there was a decrease in his temperature as the fever subsided"; "there was a sharp drop-off in sales"
    --3 is a kind of change, alteration, modification
    --3 has particulars:
     shrinking, shrinkage; casualty; sinking; attrition; dwindling, dwindling away; waning
    Derived form: verb drop off1
,Verb drop off has 4 senses
  1. drop off - fall or diminish; "The number of students in this course dropped off after the first test"
    --1 is one way to
    decrease, diminish, lessen, fall
    Derived form: noun drop-off3
    Sample sentence:
    Something ----s
  2. fall asleep, dope off, flake out, drift off, nod off, drop off, doze off, drowse off - change from a waking to a sleeping state; "he always falls asleep during lectures"
    Sample sentence:
    Somebody ----s
  3. fall back, lose, drop off, fall behind, recede - retreat
    --3 is one way to regress, retrograde, retrogress
    Sample sentence:
    Somebody ----s
  4. slip, drop off, drop away, fall away - get worse; "My grades are slipping"
    --4 is one way to worsen, decline
    Derived form: noun drop-off1
    Sample sentences:
    Something ----s
    Somebody ----s
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