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Fitting its definition precisely.
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Having all of its parts in harmony with a common purpose.
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Without fault or mistake; without flaw, of supreme quality.
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Excellent and delightful in all respects.
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Morally or spiritually immaculate or ideal.
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(grammar, of a tense or verb form) Representing a completed action.
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(biology) Sexually mature and fully differentiated.
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(botany, of flowers) Having both male parts (stamens) and female parts (carpels).
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(mathematics, of a number) Equal to the sum of its proper divisors.
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(mathematical analysis, of a set) Equal to its set of limit points, i.e. set A is perfect if A=A'.
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(music) Describing an interval or any compound interval of a unison, octave, or fourths and fifths that are not tritones.
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(of a cocktail) Made with equal parts of sweet and dry vermouth.
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(obsolete) Well informed; certain; sure.
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(obsolete) Innocent, guiltless; without blemish.
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(obsolete) Sane, of sound mind.