noun, plural cen·til·lions, (as after a numeral) cen·til·lion.
- a cardinal number represented in the U.S. by 1 followed by 303 zeros, and in Great Britain by 1 followed by 600 zeros.
- amounting to one centillion in number.
noun plural -lions or -lion
- (in Britain and Germany) the number represented as one followed by 600 zeros (10 600)
- (in the US, Canada, and France) the number represented as one followed by 303 zeros (10 303)