1Cause to lose fitness or muscle tone, especially through lack of exercise.
- ‘sedentary lifestyles that decondition their bodies’
Reform or reverse (previously conditioned behaviour), especially in the treatment of phobia and other anxiety disorders in which the fear response to certain stimuli is brought under control.
- ‘According to Terry Givens, who helped design fitness courses for the United States Air Force Academy, as we age, our tissues decondition.’
- 2.1informal Persuade (someone) to abandon a habitual mode of thinking.