giga-

a combining form meaning “billion,” used in the formation of compound words: gigabyte.

Origin of giga-

From the Greek word gígās giant

Words nearby giga-

gifu, gig, gig economy, gig mill, gig-lamps, giga-, gigabit, gigabyte, gigacycle, gigaelectron volt, gigaflop

British Dictionary definitions for giga-

giga-
/ (ˈɡɪɡə, ˈɡaɪɡə) /

combining form

denoting 10 9 gigavolt Symbol: G
(in computer technology) denoting 2 30 gigabyte

Word Origin for giga-

from Greek gigas giant

Medical definitions for giga-

giga-

pref.

One billion (109):gigahertz.

Scientific definitions for giga-

giga-

A prefix that means:
One billion (109), as in gigahertz, one billion hertz.
230 (that is, 1,073,741,824), which is the power of 2 closest to a billion, as in gigabyte.