Meaning of “all-important” in the English Dictionary

american-english dictionary

"all-important" in American English

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all-importantadjective [ not gradable ]

us /ˈɔl ɪmˈpɔrˈtə nt/

more important than anything else:

For this sauce, fresh basil is the all-important ingredient.

(Definition of “all-important” from the Cambridge Academic Content Dictionary © Cambridge University Press)