- to suppose or assume beforehand; take for granted
- to require or imply as a preceding condition: an effect presupposes a cause
Origin of presupposeMiddle English presupposen ; from Middle French presupposer, altered (based on poser, to place) ; from Medieval Latin praesupponere, past participle praesuppositus: see pre- and amp; suppose
transitive verbpre·sup·posed, pre·sup·pos·ing, pre·sup·pos·es
- To believe or suppose in advance: “In passing moral judgments &ellipsis; we presuppose that a man's actions, and hence also his being a good or a bad man, are in his power” (Leo Strauss).
- To require or involve necessarily as an antecedent condition: “The term tax relief &ellipsis; presupposes a conceptual metaphor: Taxes are an affliction” (George Lakoff).
(third-person singular simple present presupposes, present participle presupposing, simple past and past participle presupposed)
- To assume some truth without proof, usually for the purpose of reaching a conclusion based on that truth.
From Latin prae- "before", and supponere "to suppose".