Definitions

dimmer

[dim-er] / ˈdɪm ər /

ADJECTIVE

darkish

Synonyms

STRONGEST

blurred cloudy dark dingy dull faint fuzzy gloomy lackluster murky shadowy vague

STRONG

dusk faded gray mat muted obscured overcast pale sullied tarnished

WEAK

blah bleary caliginous dreary dusky flat ill-defined indistinct lightless monotone monotonous opaque poorly lit tenebrous unclear unilluminated weak

Antonyms

STRONGEST

bright cheerful clear distinct encouraging happy light lively luminous shining sparkling vivacious

WEAK

brilliant favorable good intelligent smart

ADJECTIVE

unfavorable with regard to opinion

Synonyms

STRONGEST

depressing gloomy somber

STRONG

disapproving discouraging

WEAK

skeptical suspicious unpromising

Antonyms

STRONGEST

cheerful encouraging happy joyful

WEAK

bright brilliant clear distinct favorable good intelligent light smart

ADJECTIVE

not very intelligent

Synonyms

STRONGEST

dull stupid

STRONG

slow

WEAK

boorish dense dim-witted doltish dumb oafish obtuse slow on uptake thick weak-minded

Antonyms

STRONGEST

intelligent smart

WEAK

bright brilliant clear distinct favorable good light

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But its prospects don’t look any dimmer than they did before the deal news, with or without Dominion.

From The Wall Street Journal • Jun. 10, 2026

For that to happen, earnings won’t need to necessarily disappoint; rather, investors can choose to take a dimmer view on the immense corporate investment in AI-related data centers.

From MarketWatch • May 3, 2026

But its struggles in advancing cutting-edge models over the past few years suggest a dimmer long-term outlook for its AI efforts to drive a broader revenue expansion.

From The Wall Street Journal • Apr. 30, 2026

M dwarf stars are smaller, cooler, and dimmer than our Sun, yet most of them host at least one rocky planet about the size of Earth.

From Science Daily • Mar. 27, 2026

These experiments imply that the Sun is dimmer in neutrinos than the calculations predict.

From "Cosmos" by Carl Sagan