- limit, demarcation, demarcation line - the boundary of a specific area
--1 is a kind of boundary, bound, bounds
--1 has particulars:city limit, city limits; upper limit; lower limit; three-mile limit Derived forms: verb demarcate1, verb demarcate2 - line, dividing line, demarcation, contrast - a conceptual separation or demarcation; "there is a narrow line between sanity and insanity"
--2 is a kind of differentiation, distinction
--2 has particulars: Rubicon, point of no returnDerived form: verb demarcate1