outsum verb2 •To exceed in total; outweighNo one else cared for him; but he had an instinct that her great love for him outsummed all he could hope from others. — 1851 •(no longer used) To exceed in number or quantity.She kept her faith; though Odo came by day With missions from the castle that outsummed His several hairs, and were of less respect; […] — 1852 formsoutsummed · outsumming · outsums