an act or instance of selecting or the state of being selected; choice.
a thing or a number of things selected.
an aggregate of things displayed for choice, purchase, use, etc.; a group from which a choice may be made: The store had a wide selection of bracelets.
Biology. any natural or artificial process that results in differential reproduction among the members of a population so that the inheritable traits of only certain individuals are passed on, or are passed on in greater proportion, to succeeding generations. Compare natural selection, sexual selection, kin selection, artificial selection.
the choice of one form instead of another in a position where either can occur, as of ask instead of tell or with in the phrase ask me.
the choice of one semantic or syntactic class of words in a construction, to the exclusion of others that do not occur there, as the choice of an animate object for the verb surprise.

1640–50; < Latin sēlēctiōn- (stem of sēlēctiō), equivalent to sēlēct(us) (see select) + -iōn- -ion

selectional, adjective
nonselection, noun
reselection, noun
superselection, noun

2. collection, gathering, pick.

1. rejection. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
selection (sɪˈlɛkʃən)
1.  the act or an instance of selecting or the state of being selected
2.  a thing or number of things that have been selected
3.  a range from which something may be selected: this shop has a good selection of clothes
4.  biology See also natural selection the natural or artificial process by which certain organisms or characters are reproduced and perpetuated in the species in preference to others
5.  a contestant in a race chosen as likely to win or come second or third
6.  (Austral)
 a.  the act of free-selecting
 b.  a tract of land acquired by free-selection

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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American Heritage
Medical Dictionary

selection se·lec·tion (sĭ-lěk'shən)
A natural or artificial process that favors or induces survival and perpetuation of one kind of organism over others that die or fail to produce offspring.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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