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Definitions of fail
  1. verb
    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"

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  2. verb
    be unsuccessful
    "Where do today's public schools fail?" "The attempt to rescue the hostages failed miserably"

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  3. verb
    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"

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  4. verb
    stop operating or functioning
    "The engine failed on the way to town"
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  5. verb
    prove insufficient
    "The water supply for the town failed after a long drought"

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  6. verb
    fail to get a passing grade
    "She studied hard but failed nevertheless" "Did I fail the test?"

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  7. verb
    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"
  8. verb
    get worse
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  9. verb
    judge unacceptable
    "The teacher failed six students"
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  10. be unable
    "I fail to understand your motives"
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  11. become bankrupt or insolvent; fail financially and close
    "A number of banks failed that year"
Antonyms of fail
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