io

or 'i·o

[ ee-oh ]

noun,plural i·os.
  1. a small, solitary hawk, Buteo solitarius, having two plumage phases and breeding only on the Island of Hawaii, where it is a rare species and the only indigenous bird of prey: classified as near threatened.

Origin of io

1
From Hawaiian ʿio
  • Also called Ha·wai·ian hawk [huh-wahy-uhn hawk, -wah yuhn] /həˈwaɪ ən ˈhɔk, -ˈwɑ yən/ .

Other definitions for Io (2 of 7)

Io1
[ ahy-oh, ee-oh ]

noun
  1. 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.

  2. Astronomy. a large volcanically active moon of the planet Jupiter.

Other definitions for Io (3 of 7)

Io2
[ ahy-oh, ee-oh ]

noun,plural I·os.

Other definitions for Io (4 of 7)

Io3

Symbol, Chemistry.

Other definitions for Io. (5 of 7)

Io.

abbreviation
  1. Iowa.

Other definitions for I/O (6 of 7)

I/O

Other definitions for I.O. (7 of 7)

I.O.

abbreviation
  1. indirect object.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use io in a sentence

British Dictionary definitions for io (1 of 5)

io

the internet domain name for
  1. British Indian Ocean Territory

British Dictionary definitions for Io (2 of 5)

Io1

/ (ˈaɪəʊ) /


noun
  1. Greek myth a maiden loved by Zeus and turned into a white heifer by either Zeus or Hera

British Dictionary definitions for Io (3 of 5)

Io2

/ (ˈaɪəʊ) /


noun
  1. the innermost of the four Galilean satellites of Jupiter, displaying intense volcanic activity. Diameter: 3640 km; orbital radius: 422 000 km

British Dictionary definitions for Io (4 of 5)

Io3

the chemical symbol for
  1. ionium

British Dictionary definitions for I/O (5 of 5)

I/O

abbreviation for
  1. input/output

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for Io

Io

[ īō, ēō ]


  1. 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.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.