Odd is an adjective denoting the quality of being unpaired, occasional, strange or unusual, or a person who is viewed as eccentric.

Odd may also refer to:

In mathematics, the term is used in several senses related to even:

    • even and odd numbers, an integer is odd if dividing by two does not yield an integer
    • even and odd functions, a function is odd if f(x) = –f(–x) for all x
    • even and odd permutations, a permutation of a finite set is odd if it is composed of an odd number of transpositions

In other contexts

  • Odd (name), a male name common in Norway
  • Odd, West Virginia, USA
  • Odd Grenland, a Norwegian football team
  • Odd Della Robbia, a character in Code Lyoko

ODD may refer to:

  • Optical Disc Drive
  • ODD (fanzine), a Hugo-nominated science fiction fanzine
  • ODD (Text Encoding Initiative), "One Document Does it all", an abstracted literate-programming format for describing XML schemas
  • ODD, a play by Hal Corley about a teenager with oppositional defiant disorder
  • Operational Due Diligence
  • Oppositional defiant disorder, a mental disorder characterized by defiant behavior

Famous quotes containing the word odd:

    Young people love what is interesting and odd, no matter how true or false it is. More mature minds love what is interesting and odd about truth. Fully mature intellects, finally, love truth, even when it appears plain and simple, boring to the ordinary person; for they have noticed that truth tends to reveal its highest wisdom in the guise of simplicity.
    Friedrich Nietzsche (1844–1900)

    At no time in history ... have the people who are not fit for society had such a glorious opportunity to pretend that society is not fit for them. Knowledge of the slums is at present a passport to society—so much the parlor philanthropists have achieved—and all they have to do is to prove that they know their subject. It is an odd qualification to have pitched on; but gentlemen and ladies are always credulous, especially if you tell them that they are not doing their duty.
    Katharine Fullerton Gerould (1879–1944)

    The American has dwindled into an Odd Fellow—one who may be known by the development of his organ of gregariousness.
    Henry David Thoreau (1817–1862)