dumaWe don't have a definition for this yet (we will soon!), these links might help: Collins Dictionary, The Free Dictionary, Wiktionary, Wikipedia.
dumbdumb(a.) Destitute of the power of speech; unable; to utter articulate sounds; as, the dumb brutes.(a.) Not willing to speak; mute; silent; not speaking; not accompanied by words; as, dumb show.(a.) Lacking brightness or clearness, as a color.(v. t.) To put to silence.
dumpdump(n.) A thick, ill-shapen piece; a clumsy leaden counter used by boys in playing chuck farthing.(n.) A car or boat for dumping refuse, etc.(n.) A ground or place for dumping ashes, refuse, etc.(n.) That which is dumped.(n.) A pile of ore or rock.(v. t.) A dull, gloomy state of the mind; sadness; melancholy; low spirits; despondency; ill humor; -- now used only in the plural.(v. t.) Absence of mind; revery.(v. t.) A melancholy strain or tune in music; any tune.(v. t.) An old kind of dance.(v. t.) To knock heavily; to stump.(v. t.) To put or throw down with more or less of violence; hence, to unload from a cart by tilting it; as, to dump sand, coal, etc.