Tonight (adverb)
During the night following the current day.
“I want to party tonight!”
“I had a wonderful time with you tonight.”
Tonight (adverb)
Last night.
Tonight (noun)
The nighttime of the current day or date; this night.
“Tonight is the night.”
“I have high hopes for tonight.”
Tonite (noun)
alternative spelling of tonight
Tonite (noun)
An explosive compound; a preparation of guncotton.
Wiktionary