Definition of “borderline” - English Dictionary

“borderline” in American English

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borderlineadjective

us /ˈbɔr·dərˌlɑɪn/

between two very different conditions, with the possibility of being unacceptable:

My blood pressure was borderline, and the doctor said I should lose weight.

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