Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “day”

day

noun     /deɪ/
24 HOURS [C] A1 a period of 24 hours: the days of the week January has 31 days. Matthew runs five miles every day. I saw her the day before yesterday.Days and times of daySpecific periods of time
LIGHT HOURS [C, U] A2 the period during the day when there is light from the sun: a bright, sunny day We've been travelling all day. These animals sleep during the day and hunt at night.Days and times of day
WORK HOURS [C] A2 the time that you usually spend at work or school: She's had a very busy day at the office.Days and times of day
the other day B1 a few days ago: I saw Terry the other day.In the past
day after day every day for a long period of time: Day after day they marched through the mountains.Continually and repeatedly
one day A2 used to talk about something that happened in the past: One day, I came home to find my windows smashed.In the past
one day/some day/one of these days B1 used to talk about something you think will happen in the future: One of these days I'll tell her what really happened.In the future and soon
days used to talk about a particular period of time when something happened or existed: in my younger days This book was written before the days of computers.In the past B1 a long time: I haven't seen Jack for days.Long periods of time
these days A2 used to talk about the present time: I don't go out much these days.Now
in those days B2 used to talk about a period in the past: In those days, no-one had a TV set.In the past
the old days a period in the pastIn the past
→ See also April Fool's Day, Boxing Day, Christmas Day, at the end of the day, field day, Independence Day, Mother's Day, New Year's Day, open day, polling day, Valentine's Day, call it a day, it's early days, make sb's day, save the day
(Definition of day noun from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “day” in other dictionaries

Word of the Day

warm-up

something that you do to prepare yourself for an activity, especially gentle exercises before a physical activity

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More