slow to learn or understand; lacking intellectual acuity; "so dense he never understands anything I say to him"; "never met anyone quite so dim"; "although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray; "dumb officials make some really dumb decisions"; "he was either normally stupid or being deliberately obtuse"; "worked with the slow students"
ADJECTIVE: In its past usage, dumb was a synonym for mute, or unable to speak. In its early nineteenth-century usage, it did not automatically reflect anything about mental or intellectual abilities. An example of its continuing use is the expression "dumb struck." It is now considered offensive.
DUMB is a 3D game engine, reminiscent of id software's Doom. In fact it is gamefile compatible with Doom, and the related games Doom II and Heretic. It is independant of the Doom source released by Id.
A dumb terminal is a desttop display device that is not capable of local processing, this being entirely carried out by the central computer. Such terminals (e.g., VT52, VT100, etc.) do not support windowing applications.