night and day

A form of day and night — All the time; round the clock; unceasingly.

Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

adverbnight and day (not comparable)
  1. alternativenot comparableAlternative form of day and night.
nounnight and day (uncountable)
  1. alternativeuncountableAlternative form of day and night: Said of things that are very different, though possibly superficially alike.
adjectivenight and day (not comparable)
  1. alternativenot comparableAlternative spelling of night-and-day.

Synonyms & antonyms

Also see
apples and orangeschalk and cheese
Cite this entry
APA

night and day. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/night%20and%20day

MLA

“night and day.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/night%20and%20day. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “night and day,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/night%20and%20day.

Source: night and day on Wiktionary, CC BY-SA 4.0.