GIGA- Meaning of GIGA- in English giga- BrE AmE ¦ɡɪɡ ə▷ — gigabyte ˈɡɪɡ ə baɪt — Preference poll, British English: ˈɡɪɡ- 84%, others ( dʒ-, -aɪ-, -iː- ) 16%. Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012