Ohio

American  

[oh-hahy-oh] / oʊˈhaɪ oʊ /

noun

1. a state in the northeastern central United States: a part of the Midwest. 41,222 sq. mi. (106,765 sq. km). Columbus. OH (for use with zip code), O.

2. a river formed by the confluence of the Allegheny and Monongahela rivers, flowing southwest from Pittsburgh, Pa., to the Mississippi in southern Illinois. 981 miles (1,580 km) long.

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Ohio British  

/ əʊˈhaɪəʊ /

noun

1. Abbreviation and zip code: OH.  a state of the central US, in the Midwest on Lake Erie: consists of prairies in the W and the Allegheny plateau in the E, the Ohio River forming the S and most of the E borders. Capital: Columbus. Pop: 11 435 798 (2003 est). Area: 107 044 sq km (41 330 sq miles)

2. a river in the eastern US, formed by the confluence of the Allegheny and Monongahela Rivers at Pittsburgh: flows generally W and SW to join the Mississippi at Cairo, Illinois, as its chief E tributary. Length: 1570 km (975 miles)

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Ohio Cultural  

1. State in the northern United States bordered by Michigan and Lake Erie to the north, Pennsylvania and West Virginia to the east, West Virginia and Kentucky to the south, and Indiana to the west. Its capital is Columbus, and its largest city is Cleveland.

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Other Word Forms

• Ohioan
  adjective

Example Sentences

But unlike in Virginia, Texas, Ohio and other states where residents are fighting 400-plus megawatt hyperscaler facilities in their backyards, California has some major barriers keeping data centers at bay.

From Los Angeles Times • Jun. 23, 2026

The Baltimore & Ohio, the nation’s first operating line, started in 1830, was financed by Baltimore merchants wanting a piece of the growing markets across the Appalachian Mountains.

From Barron's • Jun. 17, 2026

On Thursday, law enforcement searched Proper’s house in Ohio and found a large quantity of boxes of spent ammunition, rounds of spent cartridge casings and tactical clothing.

From The Wall Street Journal • Jun. 16, 2026

Wilson, who was the biographer for A. Philip Randolph, the iconic civil rights and labor leader, said the Ohio FBI raids “were an act of desperation that will backfire and only inspire greater voter turnout.”

From Salon • Jun. 16, 2026

Ohio gets very cold and slushy in January.

From "Mr. Lemoncello's Library Olympics" by Chris Grabenstein