Something that is whole or finished.

पूर्ण

English Usage: The project is now complete.

Hindi Usage: यह परियोजना अब पूर्ण है।

To finish or make something whole.

पूरा करना

English Usage: Please complete the form before submission.

Hindi Usage: कृपया सबमिशन से पहले फॉर्म पूरा करें।

Having all the necessary parts; not lacking anything.

संपूर्ण

English Usage: The puzzle is complete with all pieces.

Hindi Usage: पज़ल सभी टुकड़ों के साथ संपूर्ण है।