also co-ordinate, 1823, in the mathematical sense ("each of two or more magnitudes used to define the position of a point, line, or plane"), especially with reference to the system invented by Descartes; from coordinate (adj.).
Hence, coordinates as a means of determining a location on the earth's surface (especially for aircraft), attested by 1960. The meaning "something of the same order, degree, or rank with another or others" is from 1850. In women's fashion, coordinates "set of matched clothing" is attested by 1959.