What does midnight mean?
Midnight is the word for 12:00 a.m., the moment when a day ends and a new calendar day begins. It can also refer more broadly to the middle or deepest part of the night. Because it marks a transition between dates, midnight carries associations of endings, beginnings, finality, and new beginnings. A deadline “at midnight” has a precise time value, while midnight used as a period or atmosphere often evokes quiet, darkness, or unusual activity. As an adjective, midnight describes something that happens at that hour, such as a midnight snack, a midnight meeting, or a midnight journey. The word is used in standard British and American English with no major regional difference. Its literal composition, “mid” plus “night,” makes its meaning especially memorable: it identifies the night’s central point while also serving as the conventional name for the moment the date changes.
The time of 12:00 a.m., when one day ends and another begins; also, the middle or period of the night.
"The clock struck midnight as the storm finally began to ease."
When referring to the exact time, midnight is equivalent to 12:00 a.m.; the broader sense refers to the night’s central period.
Occurring, taking place, or taking effect at midnight.
"They took the midnight train to avoid the long daytime journey."
This use is common in phrases describing late-night events, journeys, meals, or deadlines.
The plural is grammatically possible but uncommon; the singular is normally preferred even when referring to repeated occasions.
"The two midnights mark the beginning and end of her watch."
Midnight literally means the middle of the night: one word has named both the darkest part of the day and the moment when the calendar turns.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does midnight come from?
Midnight comes from Old English midnæht, a compound of mid, meaning “middle,” and næht, meaning “night.” The element mid- is related to the modern word middle, while næht developed into night. The compound has continued in English with the form midnight, and related words such as midday, midsummer, and midwinter preserve the same productive mid- element.
How midnight is actually used
The time sense is standard in formal and informal English. When midnight refers to the period rather than the exact time, it often has a literary or atmospheric connotation involving darkness, silence, or liminal moments.
Easily confused with midnight
Midnight is the beginning of a new day and the middle of the night, whereas midday is the middle of the daytime and normally corresponds to noon.