What is "unteach"

Unteach \Un*teach"\, v. t. [1st pref. un- + teach.]

1. To cause to forget, or to lose from memory, or to disbelieve what has been taught.

   Experience will unteach us.
   --Sir T. Browne.

   One breast laid open were a school Which would unteach mankind the lust to shine or rule.
   --Byron.

2. To cause to be forgotten; as, to unteach what has been learned.
   --Dryden.

vb. 1 (context transitive English) To cause someone to unlearn; to make someone forget something they have been taught. 2 (context transitive English) To cause something previously learned to be forgotten.

1. v. cause to disbelieve; teach someone the contrary of what he or she had learned earlier

2. cause to unlearn; "teach somebody to unlearn old habits or methods"

3. [also: untaught]