[with object] Hinder, restrain, or prevent (an action or process) 

‘cold inhibits plant growth’ Oxford dictionary

The conscious prevention of habitual reaction to an external stimulus.

The interaction between mind and body (in human consciousness) renders a necessary awareness of the need to stop all physical activity with regards to the body in order to control it completely. All physical activity at the level of the musculo-skeletal level leads to tension in activity. All activity that is enacted below the level of awareness will be habitual. In order to perform function in a different manner, it will be necessary to tell muscles to stop activating. Only then will muscle perform as we choose. So inhibition is the ability to stop activity, think about how to do something and then fulfill, with choice, our actions. Literally, stop, think and then act.