"오" is a Korean character that represents the sound "o" in the Korean alphabet, known as 한글 (Hangul). It is the 15th letter in the Hangul system and is pronounced like the English "o" in "go." The character can be used in various words and phrases, contributing to the rich phonetic structure of the Korean language. In addition to its phonetic role, "오" can also mean "five" in Korean when used as a numeral. This number is significant in various cultural contexts, such as in the Korean traditional counting system and in games. Understanding "오" is essential for anyone learning the Korean language.