Dictionarybor'der line"boundary line; frontier. bor•der•linePronunciation: (bôr'dur-līn"), [key] —adj. 1. on or near a border or boundary. 2. uncertain; indeterminate; debatable: not an alcoholic, but a borderline case. 3. not quite meeting accepted, expected, or average standards. 4. approaching bad taste or obscenity: He made several borderline remarks that offended them. —n. a person suffering from borderline personality. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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