Demarcation
Pronunciation : De`mar*ca"tion
Part of Speech : n.
Etymology : [F. d?marcation; pref. d?- (L. de) + marquer to mark, of German origin. See Mark.]
Definition : Defn: 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.
Source : Webster's Unabridged Dictionary, 1913