day
A1Universal (used across all registers from informal to formal)
Definition
Meaning
The period of approximately 24 hours during which the Earth completes one rotation on its axis, or the period of daylight between sunrise and sunset.
A specific period of time, often used metaphorically to indicate an era, age, or period of one's life. Also used to denote the anniversary of a specific date.
Linguistics
Semantic Notes
The meaning shifts contextually: 'I'll see you tomorrow' (24-hour period); 'It's a beautiful day' (daylight hours); 'In my grandfather's day' (historical era).
Dialectal Variation
British vs American Usage
Differences
Minimal lexical differences. Potentially minor usage frequency in certain collocations (e.g., 'bank holiday' vs. 'federal holiday').
Connotations
Similar core connotations. 'Day' in 'Remembrance Day' (UK/Commonwealth) vs. 'Veterans Day' (US) carries similar solemn, commemorative weight but reflects different national histories.
Frequency
Equally high frequency in both dialects.
Vocabulary
Collocations
Grammar
Valency Patterns
preposition + day (on Monday, in those days, by day)adjective + day (sunny day, long day)day + of + noun (day of the week, day of judgement)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Call it a day”
- “Make someone's day”
- “Day in, day out”
- “At the end of the day”
- “Save for a rainy day”
Usage
Context Usage
Business
Refers to business days, working days, deadlines (e.g., 'The report is due in five business days').
Academic
Used in historical and scientific contexts to denote specific periods or measurement units (e.g., 'The experiment lasted 30 days').
Everyday
The most common context, referring to calendar days, plans, and weather (e.g., 'What day is it today?').
Technical
In astronomy, a 'sidereal day' or 'solar day'; in computing, 'runtime days'.
Examples
By Part of Speech
verb
British English
- We decided to day-trip to Brighton.
American English
- The team will day-travel for the conference.
adverb
British English
- They travelled day and night to get here.
American English
- The store is open days, evenings, and weekends.
adjective
British English
- She took a day return ticket to London.
American English
- He works the day shift at the hospital.
Examples
By CEFR Level
- Today is a sunny day.
- I go to school every day.
- My birthday is my favourite day.
- Let's meet for coffee one day next week.
- It took me all day to finish the report.
- Back in the day, we didn't have mobile phones.
- The day after the election, the results were confirmed.
- From day one, she showed exceptional talent.
- We need to take it one day at a time.
- His groundbreaking research will see the light of day in next month's journal.
- The committee will reconvene at the close of business on the appointed day.
- She fought her case day in and day out for years.
Learning
Memory Aids
Mnemonic
Imagine the letters D-A-Y standing for 'Dawn At Yesterday' – connecting the word to the cycle of mornings.
Conceptual Metaphor
TIME IS A RESOURCE ('Spend the day wisely'); LIFE IS A DAY ('His day has come'); KNOWLEDGE IS LIGHT ('The day I understood it').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid using 'day' for 'date' (день vs. дата). 'What is the day today?' asks for the day of the week, not the calendar date. The Russian phrase 'на днях' translates as 'the other day' (recently), not 'on the days'. Beware of false friends like 'день' in idioms that don't translate directly.
Common Mistakes
- Using 'in' instead of 'on' with specific days ('on Monday', NOT 'in Monday'). Confusing 'everyday' (adjective) with 'every day' (adverbial phrase). Using 'day' for part of the day ('morning/afternoon' is more precise).
Practice
Quiz
Which phrase means 'to finish working for the day'?
FAQ
Frequently Asked Questions
No, it has three primary meanings: 1) the 24-hour calendar period, 2) the daylight hours (opposite of night), and 3) a more figurative era or time ('in my day').
'Everyday' is an adjective meaning 'ordinary' or 'routine' (e.g., everyday problems). 'Every day' is an adverbial phrase meaning 'each day' (e.g., I exercise every day).
Use 'on' for specific, named days (on Monday, on Christmas Day). Use 'in' for periods containing days (in the old days, in two days). 'By' is used for deadlines (by the next day).
Yes, but it's rare and often hyphenated, meaning to spend the day in a particular place or way (e.g., 'We day-tripped to the coast'). It's considered informal or non-standard.
Collections
Part of a collection
Numbers and Time
A1 · 50 words · Numbers, dates, days and expressions of time.