tonight

Etymology

From Middle English tonyght, to niȝt, from Old English tō niht.

adv

1. During the night following the current day; during the evening of today.
   I want to party tonight!
   I had a wonderful time with you tonight.
2. (obsolete) Last night.
   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. 1596, William Shakespeare, The Life and Death of King John, act 4, scene 2, page 165

noun

1. The nighttime of the current day or date; this night.
   Tonight is the night.
   I have high hopes for tonight.