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adj. dim·mer, dim·mest
a. Lacking in brightness: a dim room.
b. Emitting only a small amount of light; faint: a dim light bulb. See Synonyms at dark.
2. Lacking luster; dull or subdued: dim, faded colors.
3. Faintly or unclearly perceived; indistinct: a dim figure in the distance; dim, far-off sounds.
4. Lacking sharpness or clarity; vague: a dim recollection; only a dim idea of how the machine worked.
5. Weak or diminished; feeble: dim eyesight; a dim hope.
6. Negative, unfavorable, or disapproving: a dim future in store; takes a dim view of gambling.
7. Dull or slow-witted: "[She] had always seemed rather dim and vacant" (Mary V. Dearborn).
tr. & intr.v. dimmed, dim·ming, dims
To make or become dim.
a. A parking light on a motor vehicle.
b. A low beam.
2. Archaic Dusk.
[Middle English, from Old English.]
a fading of light