Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

BBB

abbreviation

Definition of BBB

  1. Better Business Bureau




Medical Dictionary

BBB

abbreviation

Medical Definition of BBB

  1. 1blood-brain barrier

  2. 2bundle branch block




Seen and Heard

What made you want to look up BBB? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

of, relating to, or near a shore

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

interruption megillah torrent rebellion
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ