noun

• The act of entering.
• (uncountable) Permission to enter.
• A doorway that provides a means of entering a building.
• (law) The act of taking possession.
• (insurance) The start of an insurance contract.
• (Midlands) A passageway between terraced houses that provides a means of entering a back garden or yard.
• A small room immediately inside the front door of a house or other building, often having an access to a stairway and leading on to other rooms
• A small group formed within a church, especially Episcopal, for simple dinner and fellowship, and to help facilitate new friendships
• An item in a list, such as an article in a dictionary or encyclopedia.
• A record made in a log, diary or anything similarly organized; (computing) a datum in a database.
• (linear algebra) A term at any position in a matrix.
• The exhibition or depositing of a ship's papers at the customhouse, to procure licence to land goods; or the giving an account of a ship's cargo to the officer of the customs, and obtaining his permission to land the goods.
• (music) The point when a musician starts to play or sing; entrance.
• (hunting) The introduction of new hounds into a pack.