The property of being sure, certainty.
The property of being sure, deft, confident of ability.
The result or product of being sure.
The state of being valid, authentic or genuine.
The genuinity - as distinguished from the efficacity or the regularity - of a sacrament as a result of some formal dispositions being fulfilled.
State of having legal force.
A quality of a measurement indicating the degree to which the measure reflects the underlying construct, that is, whether it measures what it purports to measure (see reliability).