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Odd vs Undefined - What's the difference?

odd | undefined |

As an initialism odd

is oppositional defiant disorder.

As an adjective undefined is

lacking a definition or value.

odd

English

Adjective

(en-adj)
  • (not comparable) Single; sole; singular; not having a mate.
  • (obsolete) Singular in excellence; unique; sole; matchless; peerless; famous.
  • Singular in looks or character; peculiar; eccentric.
  • Strange, unusual.
  • *
  • , title=(The Celebrity), chapter=5 , passage=We made an odd party before the arrival of the Ten, particularly when the Celebrity dropped in for lunch or dinner. He could not be induced to remain permanently at Mohair because Miss Trevor was at Asquith, but he appropriated a Hempstead cart from the Mohair stables and made the trip sometimes twice in a day.}}
  • (not comparable) Occasional; infrequent.
  • * (Sir Walter Scott), Guy Mannering – or The Astrologer
  • I assure you, if I were Hazlewood I should look on his compliments, his bowings, his cloakings, his shawlings, and his handings with some little suspicion; and truly I think Hazlewood does so too at some odd times.
  • (not comparable) Left over, remaining when the rest have been grouped.
  • (not comparable) Casual, irregular, not planned.
  • (not comparable, in combination with a number, not comparable) About, approximately.
  • (not comparable) Not divisible by two; not even.
  • Synonyms

    * (not having a mate) single, mismatched * (strange) bizarre, peculiar, queer, rum, strange, unusual, weird, fremd * (about) about, approximately, around * See also

    Antonyms

    * (not divisible by two) even

    Derived terms

    * oddball * odd duck * odd one out * odds

    Anagrams

    * *

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
  • The result of division by zero is undefined .

    Antonyms

    * defined