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
Tan left Apple to found io Products alongside Jony Ive, Apple’s former chief design officer, and other leaders.
From MarketWatch ● Jul. 10, 2026
The idea for io, which Sir Jony founded last year, grew out of several years of quiet collaboration between the two companies, according to the announcement.
From BBC ● May 21, 2025
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 is the highest resolution image of Io ever obtained by an Earth-based telescope.
From Science Daily ● May 30, 2024
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
The properties of TOI-6713.01 are perhaps most similar to those of the Jovian moon Io, where scientists recently discovered a lava lake as smooth as glass.
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 Brainerd Kellogg
The I/O event was “almost entirely commercially driven,” according to Windsor.
From MarketWatch ● May 20, 2026
The model is beginning with video, but will soon be able to “generate any output from any input,” Demis Hassabis, who leads Google’s DeepMind unit, says at the company’s 2026 I/O conference.
From The Wall Street Journal ● May 19, 2026
The order is for production of wafer-level test and burn-in of silicon photonics integrated circuits, used in data center optical interconnects and emerging optical I/O architectures for AI processors, according to Aehr.
From Barron's ● Apr. 3, 2026
Next month, it’ll kick off its always-exciting Worldwide Developers Conference, likely with as many A.I. mentions as Google’s recent I/O had, if not more.
From Slate ● May 24, 2024
VM/CMS officially supports a whole bestiary of virtual card readers, virtual printers, and other phantom devices; these are used to supply some of the same capabilities Unix gets from pipes and I/O redirection.
From The Jargon File, Version 4.2.2, 20 Aug 2000 by Guy L. Steele
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
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
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
I see them shaking their fists in the face of the parietal tutor.—Oration before H.L. of I.O. of O.F.,
From A Collection of College Words and Customs by Benjamin Homer Hall
Post-mortem examinations are to be carried out on Tuesday on two teenagers from Dublin who died on the Greek island of Ios.
From BBC ● Jul. 3, 2023
After Ios, we had planned to continue unwinding in Mykonos for two days.
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
Certain central Aegean islands, Antiparos, Ios, Amorgos, Syros and Siphnos, were all found to be singularly rich in evidence of the middle-Aegean period.
From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg
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.
