tr.v. pre·sup·posed, pre·sup·pos·ing, pre·sup·pos·es
1. To believe or suppose in advance: "In passing moral judgments ... we presuppose that a man's actions, and hence also his being a good or a bad man, are in his power" (Leo Strauss).
2. To require or involve necessarily as an antecedent condition: "The term tax relief ... presupposes a conceptual metaphor: Taxes are an affliction" (George Lakoff).
pre·sup′po·sition (prē-sŭp′ə-zĭshən) n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.