The best, most favourable or desirable, especially under some restriction.
Describing a search algorithm that always returns the best result.
The best of its kind
Excellent and delightful in all respects.
Fitting its definition precisely.
Having all of its parts in harmony with a common purpose.
Of a number: equal to the sum of its proper divisors.
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'.
Sexually mature and fully differentiated.
Made with equal parts of sweet and dry vermouth.
Representing a completed action.
Describing an interval or any compound interval of a unison, octave, or fourths and fifths that are not tritones.
Without fault or mistake; thoroughly skilled or talented.
A perfect score; the achievement of finishing a stage or task with no mistakes.
A leader of the Cathar movement.
The perfect tense, or a form in that tense.
To take an action, usually the filing of a document in the correct venue, that secures a legal right.
To make perfect; to improve or hone.