(psychology) A technique of behavior modification through positive and negative reinforcement and positive and negative punishment.

The conditional mood.

(grammar) A combination of the conditional mood and the perfect tense, roughly corresponding to English 'I would have...'

(psychology) A learning process in which a previously neutral stimulus (such as a bell) is paired with a potent stimulus (such as food in the case of a dog), so that the neutral stimulus comes to elicit a conditioned response (salivation) similar to the one elicited by the potent stimulus.

present participle of air-condition

(UK) Alternative spelling of air conditioning

The state of temperature and humidity produced by an air conditioner. / An air conditioner or system of air conditioners.

Alternative spelling of air-conditioning

(idiomatic) The condition of being used, but still like new, as if freshly minted.

To mechanically cool a space or an entire structure.