'Tonight' definitions:

Definition of 'tonight'

From: WordNet
adverb
During the night of the present day; "drop by tonight" [syn: tonight, this evening, this night]
noun
The present or immediately coming night

Definition of 'Tonight'

From: GCIDE
  • Tonight \To*night"\, adv. [Prep. to + night]
  • 1. On this present or coming night. [1913 Webster]
  • 2. On the last night past. [Obs.] --Shak. [1913 Webster]

Definition of 'Tonight'

From: GCIDE
  • Tonight \To*night"\, n. The present or the coming night; the night after the present day. [1913 Webster]

Synonyms of 'tonight'

From: Moby Thesaurus