definition of
GB

[1] #1 GB n. [sarin] a highly toxic chemical nerve agent that inhibits the activity of cholinesterase. wn

[2] #2 GB n. [gilbert, Gb, Gi] a unit of magnetomotive force equal to 0.7958 ampere-turns. wn

[3] #3 GB n. [gigabit, Gbit, Gb] a unit of information equal to 1000 megabits or 10^9 (1,000,000,000) bits. wn

[4] #4 GB n. [gigabyte, G] a unit of information equal to 1000 megabytes or 10^9 (1,000,000,000) bytes. wn

[5] #5 GB n. [gigabyte, gibibyte, G, GiB] a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes. wn