Perfect
Part of speech: adjective
Definition: Fitting its definition precisely. Having all of its parts in harmony with a common purpose. Thoroughly skilled or talented. Excellent and delightful in all respects. (of a tense or verb form) Representing a completed action. Sexually mature and fully differentiated. Having both male (stamens) and female (carpels) parts. Of a set, that it is equal to its set of limit points, i.e. set A is perfect if A=A'.
Part of speech: verb
Definition: 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.
Example sentence: To live is to change, and to be perfect is to have changed often.
Perfective
Part of speech: adjective
Definition: of, or relative to the perfect tense or perfective aspect.
Part of speech: noun
Definition: a perfective verb form