Requirement

Part of speech: noun (n.)

1. The act of requiring; demand; requisition.

2. That which is required; an imperative or authoritative command; an essential condition; something needed or necessary; a need. One of those who believe that they can fill up every requirement contained in the rule of righteousness. J. M. Mason. God gave her the child, and gave her too an instinctive knowledge of its nature and requirements. Hawthorne.