From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): (n.) The end or close of a pleading, e.g., the formal ending of an indictment, "against the peace," etc.

(2): (n.) The last part of anything; close; termination; end.

(3): (n.) Final decision; determination; result.

(4): (n.) Any inference or result of reasoning.

(5): (n.) The inferred proposition of a syllogism; the necessary consequence of the conditions asserted in two related propositions called premises. See Syllogism.

(6): (n.) Drawing of inferences.

(7): (n.) An experiment, or something from which a conclusion may be drawn.

(8): (n.) An estoppel or bar by which a person is held to a particular position.

King James Dictionary [2]

Conclusion n. L.

1. End close the last part as the conclusion of an address. 2. The close of an argument, debate or reasoning inference that ends the discussion final result.

Let us hear the conclusion of the whole matter fear God, and keep his commandments for this is the whole of man.  Ecclesiastes 12 .

3. Determination final decision.

After long debate, the house of commons came to this conclusion.

4. Consequence inference that which is collected or drawn from premises particular deduction from propositions, facts, experience, or reasoning. 5. The event of experiments experiment.

We practice all conclusions of grafting and inoculating. Little used.

6. Confinement of the thoughts silence. Not used.

International Standard Bible Encyclopedia [3]

kon - kloo´zhun ( סוף , ṣōph ): In  Ecclesiastes 12:13 the King James Version, where the Revised Version (British and American) has "the end," namely, a summary of the entire argument of the book.