IPA: /ˈbɪljənz/
KK: /ˈbɪljənz/
A very large number, often used to describe amounts that are in the thousands of millions.
The company made billions of dollars in profit last year.
A billion is the number equal to one thousand million, or 1,000,000,000.
The population of the country reached billions in the last decade.
Billions → The word is derived from 'billion' (from French 'billion', meaning a million million, or 10^12) with the suffix '-s' indicating plural. Thus, 'billions' refers to multiple instances of a billion.
Think of 'billion' as a term for a million million, and when you add '-s', it simply means there are many of those large numbers.