Ac″tu‐a‐ry (�), n.; pl.Actuaries (�). [L. actuarius copyist, clerk, fr. actus, p. p. of agere to do, act.] 1. (Law) A registrar or clerk; — used originally in courts of civil law jurisdiction, but in Europe used for a clerk or registrar generally.
2. The computing official of an insurance company; one whose profession it is to calculate for insurance companies the risks and premiums for life, fire, and other insurances.