HITHERTO


Meaning of HITHERTO in English

hith ‧ er ‧ to /ˌhɪðəˈtuː◂ $ -ər-/ BrE AmE adverb formal

up to this time:

a species of fish hitherto unknown in the West

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.