Simple Definition of billion
: the number 1,000,000,000 : one thousand million
: a very large amount or number
: the number 1,000,000,000,000
Examples of billion in a sentence
We could see a billion stars in the sky.
Did You Know?
How much is a billion? It might depend who you ask. Billion was borrowed from French in the late 1600s to indicate the number one million raised to the power of two, or a million million - a number represented by a one followed by 12 zeros. However, the French later changed their naming conventions so that a billion became a thousand million (a one followed by nine zeros) and a trillion became a thousand thousand million (or a million million, the old billion). The French have since returned to the older system, but it was this new system that was adopted by American English speakers in the 1800s. In Britain the newer system has seen increasing use since the 1950s, but the older sense is still sometimes used there as well.
Origin of billion
French, from bi- + -illion (as in million)
First Known Use: 1834
BILLION Defined for Kids
Definition of billion for Students
1 : a thousand millions
2 : a very large number <billions of stars>
Seen and Heard
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