(a) Phil. Not a natural or essential part of a thing, non-essential, incidental, secondary; (b) not inherent in a thing, induced from without; (c) ?growing out of something else, ?outward, external. …

(a) In due or proper form; according to established procedure; orderly, correct, regular, conventional; formal argument, argument following the rules of logic; (b) ?beautiful, shapely. …