Quick definitions from WordNet (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 ("The contract set out the conditions of the lease")
▸ noun:  a mode of being or form of existence of a person or thing ("The human condition")
▸ noun:  a state at a particular time ("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 ("I condition my hair after washing it")
▸ verb:  put into a better state ("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

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▸ Also see condition