GB (Noun) — A unit of information equal to 1000 megabits or 10^9 (1,000,000,000) bits.
GB (Noun) — A unit of magnetomotive force equal to 0.7958 ampere-turns.
GB (Noun) — A unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes.
GB (Noun) — A highly toxic chemical nerve agent that inhibits the activity of cholinesterase.
GB (Noun) — An island comprising England and Scotland and Wales.
GB (Noun) — A unit of information equal to 1000 megabytes or 10^9 (1,000,000,000) bytes.