a group of machine parts that fit together to form a tool or machine a substance important for human and animal health, particularly for making bones and teeth the act of closing something a review of the quality of a work a discrimination between things as different and distinct act in an independent manner living or growing naturally in an area, not brought from somewhere else having a path that is not straight or direct concerning philosophy concerning how the body functions a prefix meaning 'before' before being important or well known concerning or used in psychiatry to cause someone or something to behave in a particular way, or to enter into a particular condition restricted to something representing a larger quality an exchange; in business this usually involves money being in full agreement; whole to use something practically for a particular purpose