1. To a very high level: The garbage was piled sky-high.
2. In a lavish or enthusiastic manner: The critics praised the play sky-high.
3. In pieces or to pieces; apart: Sappers blew the bridge sky-high.
1. High up in the air: sky-high trees.
2. Exorbitantly high in cost or value: sky-high prices; sky-high stocks.
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.