| adj. | 1. | equally large; - of probabilities. |
| n. | 1. | a lottery in which the organizers retain fifty percent of the money wagered, and distribute fifty percent of the wagered money to the winner. |
| Adj. | 1. | fifty-fifty - equal in degree or extent or amount; or equally matched or balanced; "even amounts of butter and sugar"; "on even terms"; "it was a fifty-fifty (or even) split"; "had a fifty-fifty (or even) chance"; "an even fight" Synonyms: even |