"o" Definition

  1. 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.
  2. n. The letter O, or its sound.
  3. n. Something shaped like the letter O; a circle or oval.
  4. n. A cipher; zero.
  5. a. One.
  6. 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.

More About o

Position in dictionary: 66938 of 111710 words.
Word Type: , n., n., n., a., interj.,
Words that start with "o": 3198
Words that end with "o": 954
Words that contain "o": 51261
Next words in dictionary: o', o'er, o's, oad, oaf
Previous words in dictionary: nyula, nystagmus, nyseys, nys, nymphotomy

English Dictionary Definition of o

Read all of this dictionary's definitions for the word "o" on this page. Also learn the word type, other words that start with, end with or contain this word, the position in the dictionary and the next and previous terms. The historical definitions of the word "o" found on this page is taken from the 1913 edition of Webster's Unabridged Dictionary.