Os'ti·a·ry noun ; plural -ries . [ Latin ostium door, entrance. See Usher .] 1. The mouth of a river; an estuary. [ R.] Sir T. Browne. 2. One who keeps the door, especially the door of a church; a porter. N. Bacon. Found on http://www.encyclo.co.uk/webster/O/39
noun the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church Found on https://www.encyclo.co.uk/local/20974
Also called · a member of the lowest-ranking of the four minor orders. · the order itself. Cf.acolyte(def. 2),exorcist(def. 2),lector(def. 2). Found on https://www.infoplease.com/dictionary/ostiary