1. The act of observing or keeping watch.
2. A high place or structure commanding a wide view, used for observation.
3. One who keeps watch.
4. South Atlantic US Outlook; view.
5. An object of concern or worry: "They were out of money. Of course it was her lookout to earn some" (Shirley Abbott).
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.