borderline
border|line /b'ɔːrdərlaɪn/ (borderlines)
1 [N-COUNT] usu N between/of n
The borderline between two different or opposite things is the division between them.
...a task which involves exploring the borderline between painting and photography.
2 [ADJ]
Something that is borderline is only just acceptable as a member of a class or group.
Some were obviously unsuitable and could be ruled out at once. Others were borderline cases.
1 [N-COUNT] usu N between/of n
The borderline between two different or opposite things is the division between them.
...a task which involves exploring the borderline between painting and photography.
2 [ADJ]
Something that is borderline is only just acceptable as a member of a class or group.
Some were obviously unsuitable and could be ruled out at once. Others were borderline cases.