Meaning of the word "the number of" in English

What does "the number of" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

the number of

US /ðə ˈnʌm.bər əv/
UK /ðə ˈnʌm.bər əv/

Phrase

a quantity or count of something, usually used with plural countable nouns

Example:
The number of students attending the lecture has increased.
We need to reduce the number of errors in our report.