an estimation that is too low; an estimate that is less than the true or actual value
make too low an estimate of; "he underestimated the work that went into the renovation"; "Don't underestimate the danger of such a raft trip on this river"
a large edge tool that cuts sheet metal by passing a blade through it
(physics) a deformation of an object in which parallel planes remain parallel but are shifted in a direction parallel to themselves; "the shear changed the quadrilateral into a parallelogram"
stop operating or functioning; "The engine finally went"; "The car died on the road"; "The bus we travelled in broke down on the way to town"; "The coffee maker broke"; "The engine failed on the way to town"; "her eyesight went after the accident"
prove insufficient; "The water supply for the town failed after a long drought"
disappoint, prove undependable to; abandon, forsake; "His sense of smell failed him this time"; "His strength finally failed him"; "His children failed him in the crisis"
become bankrupt or insolvent; fail financially and close; "The toy company went bankrupt after the competition hired cheap Mexican labor"; "A number of banks failed that year"
fall short in what is expected; "She failed in her obligations as a good daughter-in-law"; "We must not fail his obligation to the victims of the Holocaust"
fail to get a passing grade; "She studied hard but failed nevertheless"; "Did I fail the test?"
judge unacceptable; "The teacher failed six students"
be unsuccessful; "Where do today's public schools fail?"; "The attempt to rescue the hostages failed miserably"
fail to do something; leave something undone; "She failed to notice that her child was no longer in his crib"; "The secretary failed to call the customer and the company lost the account"
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"
fall heavily or suddenly; decline markedly; "The real estate market fell off"
fall or sink heavily; "He slumped onto the couch"; "My spirits sank"
a means or agency by which something is expressed or communicated; "the voice of the law"; "the Times is not the voice of New York"; "conservatism has many voices"
the distinctive quality or pitch or condition of a person's speech; "A shrill voice sounded behind us"
the ability to speak; "he lost his voice"
the sound made by the vibration of vocal folds modified by the resonance of the vocal tract; "a singer takes good care of his voice"; "the giraffe cannot make any vocalizations"
something suggestive of speech in being a medium of expression; "the wee small voice of conscience"; "the voice of experience"; "he said his voices told him to do it"
a sound suggestive of a vocal utterance; "the noisy voice of the waterfall"; "the incessant voices of the artillery"
(metonymy) a singer; "he wanted to hear trained voices sing it"
(linguistics) the grammatical relation (active or passive) of the grammatical subject of a verb to the action that the verb denotes
being or affecting only a part; not total; "a partial description of the suspect"; "partial collapse"; "a partial eclipse"; "a partial monopoly"; "partial immunity"