A1 noun Neutral #4,188 most common

century

/ˈsentʃəri/

A century is a period of 100 years. It is a common unit of time used to group historical events and long durations.

Examples

3 of 5
1

We are currently living in the 21st century.

We are currently living in the 21st century.

2

The document dates back to the late 18th century.

The document dates back to the late 18th century.

3

I haven't seen you in a century!

I haven't seen you in a century!

Word Family

Noun
century
Adjective
centennial
Related
centenarian
💡

Memory Tip

Remember that 'cent' means 100. Just like there are 100 cents in a dollar, there are 100 years in a century.

Quick Quiz

The 20th _______ saw many changes in technology.

Correct!

The correct answer is: century

Examples

1

We are currently living in the 21st century.

everyday

We are currently living in the 21st century.

2

The document dates back to the late 18th century.

formal

The document dates back to the late 18th century.

3

I haven't seen you in a century!

informal

I haven't seen you in a century!

4

The industrial revolution began in the eighteenth century.

academic

The industrial revolution began in the eighteenth century.

5

Our family business has operated for over a century.

business

Our family business has operated for over a century.

Word Family

Noun
century
Adjective
centennial
Related
centenarian

Common Collocations

turn of the century turn of the century
half a century half a century
last century last century
for a century for a century
quarter of a century quarter of a century

Common Phrases

once in a century

once in a century

at the turn of the century

at the turn of the century

for centuries

for centuries

Often Confused With

century vs decade

A decade is 10 years, whereas a century is 100 years.

century vs millennium

A millennium is 1,000 years, which is ten times longer than a century.

📝

Usage Notes

When referring to a specific century, we almost always use the definite article 'the' and an ordinal number (e.g., the 19th century). In casual speech, it can be used hyperbolically to mean a very long time.

⚠️

Common Mistakes

Learners often forget to use 'the' before the century name. Another mistake is confusing the number of the century with the years (e.g., the 1900s is actually the 20th century).

💡

Memory Tip

Remember that 'cent' means 100. Just like there are 100 cents in a dollar, there are 100 years in a century.

📖

Word Origin

Derived from the Latin word 'centuria', which means a group of one hundred.

Grammar Patterns

countable noun plural: centuries often used with ordinal numbers (1st, 2nd, 21st)
🌍

Cultural Context

Western history is traditionally divided into centuries to track social, political, and technological progress.

Quick Quiz

The 20th _______ saw many changes in technology.

Correct!

The correct answer is: century

More Time words

lifetime

A1

A lifetime is the entire period of time that a person is alive. It can also refer to the length of time that an object, like a machine, works correctly.

Monday

A1

Monday is the day of the week between Sunday and Tuesday. In many parts of the world, it is regarded as the first day of the working and school week.

Tuesday

A1

Tuesday is the third day of the week, positioned between Monday and Wednesday. In most Western cultures and business environments, it is regarded as the second day of the standard work week.

Thursday

A1

Thursday is the day of the week that comes after Wednesday and before Friday. It is typically considered the fourth day of the working week in most Western countries.

Saturday

A1

Saturday is the day of the week that follows Friday and comes before Sunday. It is widely considered the first day of the weekend and is typically a day for rest or leisure in many cultures.

Sunday

A1

Sunday is the seventh day of the week, positioned between Saturday and Monday. In many parts of the world, it is considered the final day of the weekend and is typically a day for rest or religious activities.

weekend

A1

The weekend is the period of time at the end of the week, typically including Saturday and Sunday. It is generally a time when people do not work or attend school and use the time for rest or leisure.

yesterday

A1

Yesterday refers to the day immediately before today. It is used to describe events, actions, or states that occurred in the very recent past, specifically one day ago.

day after tomorrow

A1

The day that comes after the one that follows today. It refers to a point in time two days into the future from the current day.

day before yesterday

A1

The day that occurred immediately before yesterday, referring to two days ago from today. It is used to pinpoint a specific time in the recent past in relation to the current day.

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