The quality or state of being perfect or complete, so that nothing substandard remains; the highest attainable state or degree of excellence

(now uncommon and nonstandard, transitive) To perfect.

plural of perfection

Of or relating to perfection; characterized by perfection.

simple past tense and past participle of perfection

present participle of perfection

In a manner that cannot be bettered; perfectly.

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.

(grammar) The perfect tense, or a form in that tense. / (video games) A perfect score; the achievement of finishing a stage or task with no mistakes.

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