n.; pl. -ries [ L. ostium door, entrance. See Usher. ] 1. The mouth of a river; an estuary. [ R. ] Sir T. Browne. [ 1913 Webster ]
2. One who keeps the door, especially the door of a church; a porter. N. Bacon. [ 1913 Webster ]
prop. a. of or pertaining to Robert Frost (definition 4). [ WordNet 1.5 ]