GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Ostiary , n.; pl. -ries . [L. ostium door, entrance. See Usher.]
   The mouth of a river; an estuary. [R.]
   Sir T. Browne.
   
   1913 Webster
   One who keeps the door, especially the door of a church; a porter.
   N. Bacon.
   
   1913 Webster