✨📕 The NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Learn More!
✨📕 The NEW Collegiate Dictionary — Learn More!

“brilliant blue”

We have one entry that includes the term brilliant blue.

Phthalogen Brilliant Blue IF3G

noun

: a blue phthalocyanine ingrain dye

See the full definition

Word of the Day

Listen to the pronunciation of gumbo

See Definitions and Examples »

Test Your Vocabulary

Commonly Misspelled Words Vol. 2 Quiz

  • sequel spelled three ways with the incorrect ways crossed out and the correct spelling circled
  • Rachel seemed to be _____ in every endeavor she started.
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.

Pick the best words!

PLAY
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
colorful-umbrella-among-black-umbrellas
Weather Words Can you handle the (barometric) pressure?
See All