dimmer; dimmest
Synonyms of dim
1
a
: emitting or having a limited or insufficient amount of light
dim stars
a dim lamp
a dim hallway
b
: dull, lusterless
dim colors
c
: lacking pronounced, clear-cut, or vigorous quality or character
a dim echo of the past
2
a
: seen indistinctly
a dim outline
b
: perceived by the senses or mind indistinctly or weakly : faint
had only a dim notion of what was going on
c
: having little prospect of favorable result or outcome
a dim future
d
: characterized by an unfavorable, skeptical, or pessimistic attitude
usually used in the phrase take a dim view of
takes a dim view of human nature
3
: dim-witted
too dim to understand the joke
4
: not perceiving clearly and distinctly
dim eyes
dimly adverb
dimness noun

dim

2 of 4

verb

dimmed; dimming

transitive verb

1
: to reduce the light from
dim the headlights
2
: to make dim or lusterless
dimmed their hopes of an early settlement

intransitive verb

: to become dim
the lights dimmed
their beauty had dimmed

dim

3 of 4

noun

1
automotive vehicles : low beam
2
archaic : dusk, dimness

dim

4 of 4

abbreviation

1
dimension
2
diminished
3
diminuendo
4
diminutive

Examples of dim in a Sentence

Adjective Just the dim outline of the building could be seen through the fog. I have a dim memory of your last visit. Verb The latest setback has dimmed hopes of an early settlement. Hopes of an early settlement have dimmed.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
Instead of lying down and trying to force yourself to hit the sack, Harris says to get up and do a quiet activity in the dim light. Helen Carefoot, Flow Space, 1 Sep. 2026 Some of those needles may include incredibly dim free-floating objects such as rogue planets or even small, wandering black holes, Benford said. Ashley Strickland, CNN Money, 30 Aug. 2026
Verb
Per a tradition established last year by the Broadway League, all Broadway theaters will dim their lights once a quarter in recognition of prominent members of the theater community who have passed. Caitlin Huston, HollywoodReporter, 3 Sep. 2026 Injuries and three straight losses in warmups have not dimmed hopes for host team Germany at the Women’s Basketball World Cup in Berlin. ABC News, 1 Sep. 2026
Noun
With planets this dim, the telescope may receive only a single particle of light once every minute. Noah Haggerty, Los Angeles Times, 28 Aug. 2026 The fabric shade gives the light fixture an almost organic quality and a dim, inviting glow. Stephanie Osmanski, Better Homes & Gardens, 21 Aug. 2026 See All Example Sentences for dim

Word History

Etymology

Adjective, Verb, and Noun

Middle English, from Old English dimm; akin to Old High German timber dark

First Known Use

Adjective

before the 12th century, in the meaning defined at sense 1a

Verb

before the 12th century, in the meaning defined at transitive sense 2

Noun

14th century, in the meaning defined at sense 2

Time Traveler
The first known use of dim was before the 12th century

Browse Nearby Words

Cite this Entry

“Dim.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dim. Accessed 4 Sep. 2026.

Kids Definition

dimmer; dimmest
1
: not bright or clear : obscure, faint
a dim light
2
: being without luster : dull
dim colors
3
a
: not seeing or understanding clearly
dim eyes
b
: not seen or understood clearly
had only a dim notion of what was going on
dimly adverb
dimness noun

dim

2 of 2 verb
dimmed; dimming
1
: to make or become dim
2
: to reduce the light from

Medical Definition

dim

abbreviation
diminished
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