Of the nature of, forming, or serving as a supplement; = supplementary, adj. With of, to. Now chiefly U.S.

That supplies a need or want; supplementary.

That makes good a deficiency; supplementary; = suppletive, adj. 1. With of, to. Now chiefly Law.

That makes good a deficiency; supplementary; = suppletory, adj. With to, †of.

Tending or seeking to supply a loss; compensative (chiefly and earliest in expletive justice n. at compounds 1). Formerly also: †having the…

That serves to eke out.

Of the nature of, forming, or serving as a supplement. With to.

That serves as a makeweight.

Supplementary; supplemental.

Designating something which serves to make up a required amount or whole, esp. in an industrial process; supplementary. Cf. to make up 3 at make, v.1…

That is an add-on; supplementary.