a. Being in a vertical position or direction: an upright post. See Synonyms at vertical.
b. Erect in posture or carriage: "She sat with grim determination, upright as a darning needle stuck in a board" (Harriet Beecher Stowe).
2. Adhering strictly to moral principles; righteous.
3. Designed with the pedals below the seat to allow an erect posture rather than a reclining one: an upright bike.
Vertically: walk upright.
1. A perpendicular position; verticality.
2. Something, such as a goalpost, that stands upright.
3. An upright piano.
4. An upright bicycle.
tr.v. up·right·ed, up·right·ing, up·rights
To restore to an upright position: The tow truck uprighted the overturned tractor trailer.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.