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| a chattering or flighty, light-headed person. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| dumb (dʌm) | |
| —adj | |
| 1. | lacking the power to speak, either because of defects in the vocal organs or because of hereditary deafness |
| 2. | lacking the power of human speech: dumb animals |
| 3. | temporarily lacking or bereft of the power to speak: struck dumb |
| 4. | refraining from speech; uncommunicative |
| 5. | producing no sound; silent: a dumb piano |
| 6. | made, done, or performed without speech |
| 7. | informal |
| a. slow to understand; dim-witted | |
| b. See also dumb down foolish; stupid | |
| 8. | (of a projectile or bomb) not guided to its target |
| [Old English; related to Old Norse dumbr, Gothic dumbs, Old High German tump] | |
| 'dumbly | |
| —adv | |
| 'dumbness | |
| —n | |