the end or close; final part.
the last main division of a discourse, usually containing a summing up of the points and a statement of opinion or decisions reached.
a result, issue, or outcome; settlement or arrangement: The restitution payment was one of the conclusions of the negotiations.
final decision: The judge has reached his conclusion.
a reasoned deduction or inference.
Logic. a proposition concluded or inferred from the premises of an argument.
the effect of an act by which the person performing the act is bound not to do anything inconsistent therewith; an estoppel.
the end of a pleading or conveyance.
Grammar, apodosis.
in conclusion, finally: In conclusion, I would like to thank you for your attention.
try conclusions with, to engage oneself in a struggle for victory or mastery over, as a person or an impediment.

1300–50; Middle English < Latin conclūsiōn- (stem of conclūsiō), equivalent to conclūs(us) closed, past participle of conclūdere (conclūd- to conclude + -tus past participle suffix) + -iōn- -ion

conclusional, adjective
conclusionally, adverb
nonconclusion, noun
preconclusion, noun

1. ending, termination, completion, finale. See end1. 2. summation.

1. beginning. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
conclusion (kənˈkluːʒən)
1.  end or termination
2.  the last main division of a speech, lecture, essay, etc
3.  the outcome or result of an act, process, event, etc (esp in the phrase a foregone conclusion)
4.  a final decision or judgment; resolution (esp in the phrase come to a conclusion)
5.  logic
 a.  a statement that purports to follow from another or others (the premises) by means of an argument
 b.  a statement that does validly follow from given premises
6.  law
 a.  an admission or statement binding on the party making it; estoppel
 b.  the close of a pleading or of a conveyance
7.  in conclusion lastly; to sum up
8.  jump to conclusions to come to a conclusion prematurely, without sufficient thought or on incomplete evidence
[C14: via Old French from Latin; see conclude, -ion]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

mid-14c., "deduction or conclusion reached by reasoning," from Fr. conclusion, from L. conclusionem, noun of action from concludere (see conclude). Also, from late 14c. "the end" (usually of speech or writing), "closing passages of a speech or writing."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Idioms & Phrases


see foregone conclusion; jump to a conclusion.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
The electoral-vote result in ninety per cent of the country would still be a
  foregone conclusion, no matter how close the race.
For one thing, the data upon which their conclusion rested were held in
  confidence by the oil company.
Their conclusion was aggregated by a modern misconception that vapors and gases
  could only be produced by volcanic activity.
The obvious conclusion is that the layer of debris ejected by the impact draws
  the line of extinction for the dinosaurs.
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