adj. 1
Of an object, surface, etc.: reflecting much light; having a high lustre; gleaming, shiny.
adj. 2
In good spirits; happy, optimistic.
I woke up today feeling so bright that I decided to have a little dance.
adj. 3
Having a clear, quick intellect; intelligent.
She’s very bright. She was able to solve the problem without my help.
adv. 1
In a bright manner; brightly, glowingly, luminously, lustrously.

Related words

Word family: brighten bright-eyed brightly brightness brightsmith brightsome brights
Phrases: meadow bright bright side bright spot bright and early

From weakest to strongest

From the opposite of bright, on the left, to its strongest synonyms, on the right.

Use in printed books, per decade from 1850 to 2019.

3 letters: hot¹
4 letters: deep¹, rich¹, glad¹, keen¹
5 letters: white¹, happy², clear¹, quick¹, smart¹, sharp¹, sunny², acute², merry², vivid², witty², lucid², aglow²
6 letters: silver², golden², clever², gifted², lively², glossy², joyous², cheery², garish², blithe¹, limpid
7 letters: smiling², shining², glowing², hopeful², radiant³, blazing², flaming², glaring², beaming², silvery³, buoyant²
8 letters: talented³, pleasant², glorious³, animated⁴, polished², splendid², colorful³, cheerful², dazzling³, brightly², luminous³, blinding², gleaming², lustrous²
9 letters: brilliant², promising³, inspiring³, favorable⁴, sparkling², colourful, ingenious³, exuberant⁴, twinkling³, vivacious³, burnished², sprightly², cloudless², unclouded
10 letters: prosperous³, favourable, glittering³, auspicious³, precocious³, propitious³
11 letters: intelligent⁴, brilliantly³, resplendent³
13 letters: scintillating

The small number after each word is its number of syllables (happy² = 2 syllables).