[dih-lee-shuh n]


an act or instance of deleting.
the state of being deleted.
a deleted word, passage, etc.
Genetics. a type of chromosomal aberration in which a segment of the chromosome is removed or lost.

Origin of deletion

1580–90; < Latin dēlētiōn- (stem of dēlētiō) a destroying, equivalent to dēlēt(us) (see delete) + -iōn- -ion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for deletion



the act of deleting or fact of being deleted
a deleted passage, word, etc, in text
the loss or absence of a section of a chromosome
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for deletion

1580s, from Latin deletionem (nominative deletio), noun of action from past participle stem of delere (see delete).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for deletion




Loss, as from mutation, of one or more nucleotides from a chromosome.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.