tonight

UK: /təˈnaɪt/ US: /təˈnaɪt/ ,(tə nīt′)

WordReference Random House Learner's Dictionary of American English © 2026

to•night /təˈnaɪt/   n. [uncountable]

1. this present or coming night;
   the night of this day:
   Tonight is the night I (will) propose to her.

adv. 

2. on this night;
   on the night of this day:
   See you tonight about six.

WordReference Random House Unabridged Dictionary of American English © 2026

to•night  (tə nīt′), n. 

1. this present or coming night;
   the night of this present day.

adv. 

2. on this present night;
   on the night of this present day.
3. [Obs.] during last night.

• Middle English to night, Old English tō niht. See to, night bef. 1000

Collins Concise English Dictionary © HarperCollins Publishers::

tonight / təˈnaɪt/ noun

1. the night or evening of this present day

adverb

1. in or during the night or evening of this day
2. last night

Etymology: Old English tōniht, from to¹ (at) + night