1. A meal eaten at midday.
2. The food provided for a midday meal.
intr.v. lunched, lunch·ing, lunch·esIdiom:
To eat a midday meal.
out to lunch Slang
Not in touch with the real world; crazy.
[Short for LUNCHEON.]
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.