De`mar*ca"tion (?), n. [F. d'emarcation; pref. d'e- (L. de) + marquer to mark, of German origin. See Mark.]
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.
© Webster 1913.