Classical Mythology. a woman who, being loved by Zeus, was transformed into a white heifer and was, at the wish of Hera, first guarded by Argus and later pursued through the world by a gadfly until she reached Egypt, where she resumed her true shape: identified by the Egyptians with Isis.
Astronomy. a large volcanically active moon of the planet Jupiter.
One of the four brightest satellites of Jupiter and the fifth in distance from the planet. It was first sighted by Galileo.
See Note at moon
From Hawaiian ʿio
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
OpenAI bought that company, io Products, in 2025 to spearhead its own device development efforts.
From The Wall Street Journal ● Jul. 12, 2026
Tan spent 24 years at Apple, most recently as vice president of product design for the iPhone and Apple Watch, before co-founding io Products, which OpenAI acquired for roughly $6.5 billion in 2025.
From Barron's ● Jul. 10, 2026
Along with OpenAI, Apple is suing io Products, the design startup founded by Jony Ive, a long-time Apple executive.
From BBC ● Jul. 10, 2026
Tan left Apple to found io Products alongside Jony Ive, Apple’s former chief design officer, and other leaders.
From MarketWatch ● Jul. 10, 2026
Wasn't quite midday so the heat wasn’t overbearing and there weren’t no heat waves across the fields io make the eye see things funny.
From "Life Is So Good" by George Dawson
This effect is dramatic on Io, Jupiter's innermost large moon, where intense gravitational stretching drives constant volcanic eruptions.
From Science Daily ● Jan. 7, 2026
The acid yellow moon Io that orbits Jupiter may be less than 30% the size of Earth, but is considered the most volcanic body in our solar system.
From Salon ● Feb. 3, 2025
But although the planet is known to be smothered in volcanoes, an opaque atmosphere has prevented anyone from seeing an eruption the way spacecraft have spotted them on Io, the hypervolcanic moon of Jupiter.
From New York Times ● May 27, 2024
“This is a terrestrial planet that I would describe as Io on steroids,” Kane said in a statement about TOI-6713.01.
From Salon ● May 14, 2024
We met other girls on Io, but I was chatting back to Quendy the whole time, even though there were some meg delays in feed service between the planets.
From "Feed" by M.T. Anderson
They are, however, frequently abbreviated thus: Iowa, Ia. or Io.;
From Higher Lessons in English A work on English grammar and composition by Kellogg, Brainerd
Tuesday’s Google I/O developer conference failed to pack the sizzle that some investors were hoping for.
From MarketWatch ● May 20, 2026
The AI eyewear will launch this fall in several optical and sunglass styles, per the announcement made during Google’s I/O event.
From Barron's ● May 19, 2026
Google Chief Executive Sundar Pichai lauded a Gemini win on stage at Google’s I/O conference last year.
From The Wall Street Journal ● Jan. 22, 2026
Google made the announcement as part of its annual I/O developer conference in Mountain View.
From Los Angeles Times ● May 20, 2025
In Great Britain, `fred', `jim' and `sheila' are common metasyntactic variables because their uppercase versions were official names given to the 3 memory areas that held I/O status registers on the lovingly-remembered BBC Microcomputer!
From The Jargon File, Version 4.2.2, 20 Aug 2000 by Steele, Guy L.
The senior coalition officer said the insurgents who supported the Qatar process “didn’t do a good I.O. campaign to sell it to their people.”
From New York Times ● Oct. 2, 2012
Between A. F. of L. and C. I.O. there still exists a thin, technical tie: the rebellious C. I. O. unions were suspended last year but they have not yet been expelled.
From Time Magazine Archive
To these three the President added Sidney Hillman, pink-cheeked, blond, curly-haired, 53, chief of Amalgamated Clothing Workers of America, vice president of C. I.O., a "labor statesman," no bumbler, coldly intellectual.
From Time Magazine Archive
Mr. Green next day notified the Canadian Trades and Labor Congress that it must expel 30,000 C. I.O. members or renounce 120,000 A. F. of L. members.
From Time Magazine Archive
The doors flanking the passages traversed display cryptic lettering, such as I.O.
From Submarine Warfare of To-day How the Submarine Menace was Met and Vanquished, With Descriptions of the Inventions and Devices Used, Fast Boats, Mystery Ships by Domville-Fife, Charles W. (Charles William)
Preparations are under way to repatriate the remains of two teenagers from Dublin who died in separate incidents on the Greek island of Ios over the weekend.
From BBC ● Jul. 4, 2023
In 2019, they opened Calilo to lure a new type of traveler to Ios.
From New York Times ● Aug. 24, 2022
In October, they interrogated a submarine cable that connects the islands of Santorini and Ios.
From Science Magazine ● Dec. 8, 2021
Last summer, I had lunch in a beach-side taverna on the island of Ios, which I had last visited when it was a hippy haven in the 1970s.
From BBC ● Jul. 24, 2015
The poet sailed to Ios, after the assembly was broken up, to join Creophylus, and stayed there some time, being now an old man.
From Hesiod, the Homeric Hymns, and Homerica by Evelyn-White, Hugh G. (Hugh Gerard)
This week the app overtook WeChat and TikTok to become the most-downloaded app for Apple and ios devices in China, though its popularity is not entirely due to merit.
From The Guardian ● Feb. 15, 2019
There are a lot of closeups and difficult-to-decipher geometry, but the intent here is clear — Sony is ios going to show us what the PS4 actually looks like.
From Forbes ● May 20, 2013
Android is much better, in my opinion, because it is not afraid to make drastic changes to its system. ios has looked similar since the start.
From Time ● Apr. 21, 2013
The price is 28,000 10000 in fives and ios 18000 50 and zoos.
From Time Magazine Archive
Only the brooding golden backlighting that makes theaters out of Parrish's scenar ios bespeaks a pre-neon sensibility.
From Time Magazine Archive
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
