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Tonight vs Undefined - What's the difference?

tonight | undefined |

As an adverb tonight

is during the night following the current day.

As a noun tonight

is the nighttime of the current day or date; this night.

As an adjective undefined is

lacking a definition or value.

tonight

English

Alternative forms

* (l) (obsolete) * tonite (qualifier)

Adverb

(-)
  • During the night following the current day.
    • I want to party tonight !
    I had a wonderful time with you tonight .
  • (obsolete) Last night.
  • * 1596 , , IV. ii. 165:
    • Besides, I met Lord Bigot and Lord Salisbury, / With eyes as red as new-enkindled fire, / And others more, going to seek the grave / Of Arthur, whom they say is killed to-night / On your suggestion.
  • * 1599 , , III. iii. 1:
    • I dreamt tonight that I did feast with Caesar, / And things unluckily charge my fantasy;

    Noun

    (en noun)
  • The nighttime of the current day or date; this night.
    • Tonight is the night.
    I have high hopes for tonight .

    Anagrams

    * English pro-forms English temporal location adverbs English words prefixed with to- 1000 English basic words

    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