noun

• A state or quality.
  "A man of his condition has no place to make requests."
• (law) A clause in a contract or agreement indicating that a certain contingency may modify the principal obligation in some way.

verb

• (transitive) To place conditions or limitations upon.
  "Yet seas that daily gain upon the shore / Have ebb and flow conditioning their march, / And slow and sure comes up the golden year."
• (transitive) To treat, especially hair with hair conditioner.
  "Experiments on steep inclines in the United States showed that washing the rails with a detergent to remove oil and grease resulted in a marked improvement; but conditioning the rails with a special neutralising chemical completely eliminated slipping on a bank on which it was so common as to necessitate restriction of trainloads."
• (transitive) To contract; to stipulate; to agree.
  "[P]ay me back my credit, / And I'll condition wi'ye."
• (transitive) To test or assay, as silk (to ascertain the proportion of moisture it contains).
  "divers parcel of silk conditioned or assayed"