1. Higher in place, position, or rank: the upper bunk; the upper half of the class.
a. Situated on higher ground: upper regions.
b. Lying farther inland: the upper Nile.
c. Northern: the upper Midwest.
3. Upper Geology & Archaeology Of, relating to, or being a later division of the period named.
4. Denoting the smaller and usually less broadly representative house of a bicameral legislature.
1. The part of a shoe or boot above the sole.
2. Informal An upper berth.
3. uppers Informal The upper teeth or a set of upper dentures.
a. A drug, especially an amphetamine, used as a stimulant.
b. An exhilarating or euphoric experience.
on (one's) uppers Informal
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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.