Definition of “frightfully” - English Dictionary

british dictionary

“frightfully” in British English

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frightfullyadverb

uk /ˈfraɪt.fəl.i/ us /ˈfraɪt.fəl.i/ old-fashioned informal

very:

I'm frightfully sorry about the noise last night.

(Definition of “frightfully” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“frightfully” in American English

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frightfullyadverb

us /ˈfrɑɪt·fə·li/

very:

She’s frightfully smart.

(Definition of “frightfully” from the Cambridge Academic Content Dictionary © Cambridge University Press)