extrinsical adjective 1noun 1forms 3 adjective1 •(rare) Extrinsic.A body cannot move, unless it be moved by some extrinsical agent: we may easily frame a conceit, how absurd it is to think that a body, by a quality in it, can work upon itself. — 1644 noun1 •(no longer used) Something that is extrinsic. formsextrinsicals · more extrinsical · most extrinsical