deselect

verb (used with object)

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

verb (tr)

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