TERABYTE Meaning of TERABYTE in English < unit > 2^40 = 1,099,511,627,776 bytes = 1024 gigabytes or roughly 10^12 bytes. (Note the spelling - one 'r'). See prefix . (1995-09-29) FOLDOC computer English dictionary. Английский словарь по компьютерам FOLDOC. 2012