adjective

borderline

borderline, marginal, on the edge

His behavior is borderline acceptable.

His behaviour is borderline acceptable.

She received a borderline pass on the exam.

She received a borderline pass on the exam.

((borderline)) ((noun)) on the edge of a category It was a borderline decision.

((to be)) borderline to be on the edge of a category His performance was borderline.

Synonyms: marginal, ambiguous, on the edge

A compound of 'border' and 'line'.

Imagine something sitting right on the 'line' that is the 'border', so it could fall on either side.

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