a person whose function or duty is the distribution of alms on behalf of an institution, a royal personage, a monastery, etc.
2.
British.
a.
a hospital official who determines the amount due for a patient's treatment.
b.
a social worker in a hospital.
Origin: 1250–1300;Middle Englishalmoiner, aumoner (with insertion of l under influence of alms) < Old Frenchaumon(i)er ≪ Late Latineleēmosynāriuseleemosynary
"official distributor of alms on behalf of another," c.1300, from O.Fr. almosnier (12c.; Mod.Fr. aumônerie), from V.L. *almosinarius, from L.L. elemosinarius (adj.) "connected with alms," from eleemosyna "alms" (see alms).