Definition of "tonight" []

• On or during the present or coming night. (adverb)
• This night or the night of this day. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "President Obama will deliver the second State of the Union speech of his term tonight at 9 p.m., a highly anticipated address that functions as the informal kickoff of the new congressional term."
• "Of course the fact that I worked all night last night and work again tonight is a mere technicality."
• ""Yep, I made a roast chicken again tonight" is not what I feel like writing, anyhow."