Perfect meaning : (grammar) The perfect tense, or a form in that tense. A perfect score; the achievement of finishing a stage or task with no mistakes. 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. (grammar, of a tense or verb form) 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. (of a cocktail) Made with equal parts of sweet and dry vermouth. Well informed; certain; sure. Innocent, guiltless.