adj.
1.denoting a quantity consisting of one thousand million items or units in the United States
2.denoting a quantity consisting of one million million items or units in Great Britain billion n.
1.the number that is represented as a one followed by 12 zeros
2.the number that is represented as a one followed by 9 zeros
Idiom of the Day
tire (someone) out or tire out (someone)
to make someone very tired
The climb up the stairs tired the elderly woman out.