Conclude is more formal than close and end:
The author concluded the article by restating the major points.
Terminate suggests reaching an established limit:
The playing of the national.
Having all necessary parts not lacking anything often used in book titles;
Not limited in any way often used for emphasis
If something is complete, it has been finished.
The work of restoring the farmhouse is complete.
It'll be two years before the process is complete.
Complete implies that a certain unit has all its parts, fully developed or perfected, and may apply to a process or purpose carried to fulfillment:
A complete explanation.
Definition of complete adjective in oxford advanced learner's dictionary.
Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
To make whole or perfect:
To write all the details asked for on a form or other document.
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The meaning of complete is having all necessary parts, elements, or steps.
How to use complete in a sentence.
Synonym discussion of complete.