Oh

Oh is an interjection with many uses, often said by people realizing something (e.g. Oh, I just realized that I must be going!). The archaic form O (always capitalized) is still used in older literary and musical works (e.g. "O Holy Night"), or occasionally in modern works to convey a sense of antiquity or nostalgia (e.g. O Brother, Where Art Thou?).

It may also refer to:

Abbreviations

OH-, aircraft registration prefix for Finland
OH, American postal abbreviation for the state of Ohio
OH, Occupational Health
IATA airline designator for Comair
in chemistry:
Hydroxy
Hydroxide
the Hydroxyl radical
the functional alcohol group in a molecule, e.g. CH3CH2OH
a Unified Soil Classification System designation for organic-rich clay or silt of high plasticity
OH, prefix of hominid fossils found at Olduvai Gorge, e.g. OH 13 ("Cindy")
military prefix for observation helicopter
OH, Twitter abbreviation for overheard

Family names

a Chinese family name
Sadaharu Oh (Ō 王), famous baseball player born in Japan of Taiwanese descent
Felicia Oh (Fujian variant of Hu (surname) 胡 ) , black belt in Brazilian Jiu-Jitsu and world-class submission grappling competitor
a Korean family surname Oh (오)
Sandra Oh, actress
Dennis Oh, working name of Dennis Joseph O'Neil

Songs

"Oh," a song by Fugazi from their 2001 album The Argument
"Oh!", a song by Sleater-Kinney from their 2002 album One Beat
"Oh" (Dave Matthews song), from his 2003 album Some Devil
"Oh" (Ciara song), a 2004 song
"Oh!" a song by Boys Noize from his album 'Oi Oi Oi'.

Translation

The word "Oh" occurs as such in the following languages: English, Esperanto, Finnish.

Translation(s) in other languages: Arabic: OH (توضيح), Czech: OH, German: OH, French: OH, Korean: OH, Italian: OH, Lithuanian: OH, Japanese: OH, Portuguese: OH, Slovak: OH, Swedish: OH, Chinese: OH.