of·fi·cer (ôfĭ-sər, ŏfĭ-)
1. One who holds an office of authority or trust in an organization, such as a corporation or government.
a. One who holds a commission in the armed forces.
b. A noncommisioned officer or warrant officer.
3. A person licensed in the merchant marine as master, mate, chief engineer, or assistant engineer.
4. A police officer.
tr.v. of·fi·cered, of·fi·cer·ing, of·fi·cers
1. To furnish with officers.
2. To command or manage as an officer.
[Middle English, from Old French officier, from Medieval Latin officārius, from Latin officium, service, duty; see OFFICE.]
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:
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.