- a cardinal number represented in the U.S. by 1 followed by 30 zeros, and in Great Britain by 1 followed by 54 zeros.
- amounting to one nonillion in number.
- (in Britain, France, and Germany) the number represented as one followed by 54 zeros (10 54)
- (in the US and Canada) the number represented as one followed by 30 zeros (10 30)
