drop-off

from WordNet (r) 3.0 (2006)
drop-off
    n 1: 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" [syn:
         {slump}, {slack}, {drop-off}, {falloff}, {falling off}]
    2: a steep high face of rock; "he stood on a high cliff
       overlooking the town"; "a steep drop" [syn: {cliff}, {drop},
       {drop-off}]
    3: a change downward; "there was a decrease in his temperature
       as the fever subsided"; "there was a sharp drop-off in sales"
       [syn: {decrease}, {lessening}, {drop-off}] [ant: {increase}]
    
from The Collaborative International Dictionary of English v.0.48
drop-off \drop-off\ n.
   1. a noticeable decline in performance; as, a drop-off in
      attendance. [WordNet sense 1]

   Syn: slump, falloff, falling off.
        [WordNet 1.5]

   2. a steep high face of rock.

   Syn: cliff. [WordNet sense 2]
        [WordNet 1.5]

   3. a change downward; as, there was a sharp drop-off in
      sales. [WordNet sense 3]

   Syn: decrease, lessening.
        [WordNet 1.5]
    

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