This can be perceived by the human eye as a perfect circle (i.e. completely round, without imperfections) and perfectly black (i.e. without reflecting any light).



  • Fitting its definition precisely.
  • Having all of its parts in harmony with a common purpose.
  • Without fault or mistake; thoroughly skilled or talented.
  • Excellent and delightful in all respects.
  • Of a number: equal to the sum of its proper divisors.
  • Representing a completed action.
  • Sexually mature and fully differentiated.
  • Of flowers, having both male parts (stamens) and female parts (carpels).
  • Of a set: equal to its set of limit points, i.e. set A is perfect if A=A'.
  • Describing an interval or any compound interval of a unison, octave, or fourths and fifths that are not tritones.
  • Made with equal parts of sweet and dry vermouth.
  • Well informed; certain; sure.
  • Innocent, guiltless.


  • The perfect tense, or a form in that tense.
  • A perfect score; the achievement of finishing a stage or task with no mistakes.


  • To make perfect; to improve or hone.
  • To take an action, usually the filing of a document in the correct venue, that secures a legal right.


Similar words

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Narrower meaning words


  • From Middle English perfit, from Old French parfit (modern: parfait), from Latin perfectus, perfect passive participle of perficere, from per- + facere. Spelling modified 15c. to conform to Latin etymology. parfait.
  • Displaced native .
  • From perfect .

Modern English dictionary

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