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English definition of “day”

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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 from the Cambridge Learners Dictionary © Cambridge University Press)
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