[ dee-si-lekt ]
/ ˌdi sɪˈlɛkt /

verb (used with object)

to discharge (a trainee) from a program of training.

Origin of deselect

First recorded in 1960–65; de- + select Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for deselect

/ (ˌdiːsɪˈlɛkt) /

verb (tr)

British politics (of a constituency organization) to refuse to select (an existing MP) for re-election
US to discharge (a trainee) during the period of training
computing to cancel (a highlighted selection of data) on a computer screen
computing to remove (the check mark) at an option in a dialogue box

Derived forms of deselect

deselection, noun
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