Definitions of condition:

• noun:   the procedure that is varied in order to estimate a variable's effect by comparison with a control condition
• noun:   an assumption on which rests the validity or effect of something else
• noun:   (usually plural) a statement of what is required as part of an agreement

  Example: "The contract set out the conditions of the lease"

• noun:   a mode of being or form of existence of a person or thing

  Example: "The human condition"

• noun:   a state at a particular time

  Example: "A condition (or state) of disrepair"

• noun:   the state of (good) health (especially in the phrases `in condition' or `in shape' or `out of condition' or `out of shape')
• noun:   information that should be kept in mind when making a decision
• verb:   establish a conditioned response
• verb:   apply conditioner to in order to make smooth and shiny

  Example: "I condition my hair after washing it"

• verb:   put into a better state

  Example: "He conditions old cars"

• verb:   specify as a condition or requirement in a contract or agreement; make an express demand or provision in an agreement
• verb:   train by instruction and practice; especially to teach self-control