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ca·boose (kə-bs)
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n.
1. The last car on a freight train, often having kitchen and sleeping facilities for the train crew, and used as a vantage point for spotting problems on the train, such as smoking brakes or the separation of cars. The introduction of electronic sensors has made the caboose unnecessary.
2. Archaic
a. A ship's galley.
b. Any of various cast-iron cooking ranges used in such galleys during the early 1800s.
c. An outdoor oven or fireplace.

[Possibly from obsolete Dutch cabuse, ship's galley, from Middle Low German kabūse : perhaps *kab-, cabin; akin to Old French cabane; see CABIN + Middle High German hūs, house.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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:

    Indo-European Roots

    Semitic Roots

    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.