Perfect

1. Fitting its definition precisely. It was a perfect circle.
2. Having all of its parts in harmony with a common purpose. A bucket with holes in the bottom is a poor bucket but perfect for watering plants.
3. Thoroughly skilled or talented. Practice makes perfect.
4. Excellent and delightful in all respects. We went to the beach and had a perfect day.
5. (grammar of a tense or verb form) Representing a completed action. I had called him twice (showed calls were made in the past). (Past Perfect tense.)
6. Accurately reproducing an original. He created a perfect copy of the original.
7. Complete; thorough; utter. He was a perfect fool.