To act intermediately; intervene; interpose.Situated between two extremes; coming between, in either position or degree; intervening; interposed: generally followed by between when the extremes are mentioned: as, an intermediate space; intermediate obstacles.n. In mathematics, a syzygetic function: thus, if U and V are quantics of the same order, and if λ and μ are indeterminate constants, λU + μV is an intermediate of U and V.n. An intermediary.In musical notation, of sharps or flats, accidental; not in the signature.