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

The late Professor Joseph Heremans of Ohio State designed the thermal conductivity experiments and guided doctoral candidate Delaram Rashadfar through the analysis.

From Science Daily • Jul. 11, 2026

Over 35 years, she did medical research and taught at Johns Hopkins, Ohio State University and the University of Texas MD Anderson Cancer Center in Houston.

From The Wall Street Journal • Jul. 10, 2026

Nicole Newcomer, a 40-year-old food-service manager from Fremont, Ohio, ended up at the hospital this week.

From The Wall Street Journal • Jul. 10, 2026

At a recent conference, Meta shared that its Prometheus data center in Ohio recently came online in July.

From MarketWatch • Jul. 9, 2026

Those Ohio kin—they’re good people mostly, but they’re limited, honey.

From "Missing May" by Cynthia Rylant