condition

The procedure that is varied in order to estimate a variable's effect by comparison with a control condition.

An illness, disease, or other medical problem.

“a heart condition”

“a skin condition”

The state of (good) health (especially in the phrases `in condition' or `in shape' or `out of condition' or `out of shape').

A state at a particular time.

“a condition (or state) of disrepair”

(usually plural) a statement of what is required as part of an agreement.

“the contract set out the conditions of the lease”

An assumption on which rests the validity or effect of something else.

Information that should be kept in mind when making a decision.

A mode of being or form of existence of a person or thing.

“the human condition”

Apply conditioner to in order to make smooth and shiny.

“I condition my hair after washing it”

Establish a conditioned response.

Put into a better state.

“he conditions old cars”

Develop (a child's or animal's) behavior by instruction and practice; especially to teach self-control.

Specify as a condition or requirement in a contract or agreement; make an express demand or provision in an agreement.