Meaning of ALL- in English

ALL-

/ ɔːl/ combining form (in adjectives and adverbs)

1.

completely :

an all-British cast

an all-inclusive price

2.

in the highest degree :

all-important

all-powerful

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.