Dum"found`er (?), v. t. To dumfound; to confound. [Written also dumbfounder.]

Dum"ma*dor` (?), n. A dumbledor.

Dum"mer*er (?), n. One who feigns dumbness. [Obs.] Burton.

Dum"my (?), a. [See Dumb.] 1. Silent; mute; noiseless; as a dummy engine.