Definition of O
() Among the ancients, O was a mark of triple time, from the notion that the ternary, or number 3, is the most perfect of numbers, and properly expressed by a circle, the most perfect figure.
(interj.) An exclamation used in calling or directly addressing a person or personified object; also, as an emotional or impassioned exclamation expressing pain, grief, surprise, desire, fear, etc.
(n.) The letter O, or its sound.
(n.) Something shaped like the letter O; a circle or oval.
(n.) A cipher; zero.
Antonyms of O
No Antonyms Found.
A list of the most frequently used words in the English languge.
Longest words in the Oxford Dictionary.