Pro multis is a Latin phrase that means "for many" or "for the many". Not having the definite article, Latin does not distinguish between these two meanings. The phrase is part of the longer phrase "qui pro vobis et pro multis effundetur in remissionem peccatorum" (which will be shed for you and for (the) many for remission of sins) used, with reference to the blood of Christ, in the consecration of the wine in the Roman Rite Mass.