Search Dictionary
Definition of speedo

speedo

/ˈspiːdoʊ/
speed · o

Plural:speedos
JUMP TO:

speedo Lexical Profile

speedo Game Scores & Validity

• noun

1

A pair of tight-fitting, brief-style swimming trunks worn by men, especially for competitive swimming (often capitalized as a trademark).

Example

"The Olympic diver adjusted his speedo before stepping onto the edge of the high platform."


2

An informal term for a speedometer, the instrument on a vehicle's dashboard that indicates its speed.

Example

"He glanced down at the speedo to make sure he was staying below the highway speed limit."

Synonyms
View all synonyms for speedo

Word Nuance & Usage

When referring to tight-fitting men's swim briefs, 'Speedo' is a genericized trademark originally capitalized as a brand name; in American English it is typically used in the singular ('a Speedo'), whereas in British and Australian English it is often used in the plural ('Speedos').

• Rhymes for speedo

Word Origin & Etymology

In its automotive sense, it is an informal shortening of 'speedometer' with the colloquial suffix '-o'. The swimwear sense derives from the trademark Speedo, coined in 1928 in Australia by Alexander MacRae from the slogan 'Speed on in your Speedos'.

Cite this Entry


Wordmom. (2026). Definition of Speedo. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/speedo
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Dictionary & Reference
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.