transitive verb presupposed -·posed′, presupposing -·pos′·ing

1. to suppose or assume beforehand; take for granted
2. to require or imply as a preceding condition an effect presupposes a cause

Etymology: ME presupposen < MFr presupposer, altered (based on poser, to place) < ML praesupponere, pp. praesuppositus: see pre- & suppose