day
UK: deɪ | US: deɪ
n. the period of light between sunrise and sunset
n. a 24-hour period; one rotation of Earth on its axis
n. a specific date or time (e.g., "Independence Day")
The word "day" traces back to Old English dæg, meaning "the daylight hours" or "a 24-hour cycle." It shares roots with Germanic languages (e.g., German Tag, Dutch dag) and ultimately derives from Proto-Indo-European dʰegʷʰ- ("to burn," referencing sunlight). Unlike compound words, "day" is monomorphic—its spelling and meaning have remained cohesive without separable morphemes in modern English.
She spends her day gardening and reading.
The project must be completed within seven days.
We’ll meet again one day.
The longest day of the year is the summer solstice.
His birthday falls on a Monday this year.