—n. 1. Math.the curve assumed approximately by a heavy uniform cord or chain hanging freely from two points not in the same vertical line. Equation: y = k cosh(x/k).
2. (in electric railroads) the cable, running above the track, from which the trolley wire is suspended.
—adj. 1. of, pertaining to, or resembling a catenary.
2. of or pertaining to a chain or linked series.