n. pl. bi·ki·nis
a. A very brief, close-fitting two-piece bathing suit worn by women.
b. A very brief, close-fitting bathing suit worn by men.
2. often bikinis Brief underpants that reach to the hips rather than to the waist.
[French, after Bikini.]
bi·kinied (-nēd) adj.
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.