demarcation
劃界,劃定界限,限界
De·mar·ca·tion n. The act of marking, or of ascertaining and setting a limit; separation; distinction.
The speculative line of demarcation, where obedience ought to end and resistance must begin, is faint, obscure, and not easily definable. --Burke.
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demarcation
n 1: the boundary of a specific area [syn: limit, demarcation
line]
2: a conceptual separation or demarcation; "there is a narrow
line between sanity and insanity" [syn: line, dividing
line, contrast]