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A state of being.

A disease, such as a heart condition.

A proposition upon which another proposition depends, such as "if-then" statements. See logical conditional.

To cause a certain response to a stimulus, see conditioning.

To replace moisture or oils, especially in hair, see conditioner.

To change climate to an appropriate level, see air conditioning.

A status effect which is usually negative, see Condition (computer gaming).

A state which is induced in the subject of a psychological experiment, see condition (experimental psychology).