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

thunderhead

play
noun thun·der·head \-ˌhed\

Simple Definition of thunderhead

  • : a very large cloud appearing before a thunderstorm

Source: Merriam-Webster's Learner's Dictionary

Full Definition of thunderhead

  1. :  a rounded mass of cumulus or cumulonimbus cloud often appearing before a thunderstorm


THUNDERHEAD Defined for Kids

thunderhead

play
noun thun·der·head \ˈthən-dər-ˌhed\

Definition of thunderhead for Students

  1. :  a rounded mass of dark cloud with white edges often appearing before a thunderstorm




Seen and Heard

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

WORD OF THE DAY

to lessen in amount, effect, or force

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

fox-in-summer-forest

Which of these is a synonym of inchoate?

formless massive frightening experimental
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