1. Of questionable or minimal quality
   "borderline grades";
   - marginal
    
2. At or near a border or boundary, especially between two different states or conditions
   "The patient's blood pressure was borderline high"

1. A line that indicates a boundary
   "The treaty established a new borderline between the two countries";
   - boundary line, border, delimitation, mete

Derived forms: borderlines

See also: minimal, minimum

Type of: bound, boundary, bounds

Encyclopedia: Borderline