\ˈji-gə, ˈgi- \

Definition of giga- 

: billion (109) gigahertz gigawatt

History and Etymology for giga-

International Scientific Vocabulary, from Greek gigas giant

Keep scrolling for more

Learn More about giga-

Dictionary Entries near giga-

gift wrap

Gifu

gig

giga-

gigabit

gigabyte

gigacycle

Statistics for giga-

Look-up Popularity

More from Merriam-Webster on giga-

Britannica.com: Encyclopedia article about giga-

Comments on giga-

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

WORD OF THE DAY

one that holds something together

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

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

TAKE THE QUIZ

Love words? Need even more definitions?

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