Noun

1. A body of water let into a coast, such as a bay, cove, fjord or estuary.
2. A passage that leads into a cavity.
   • 1748. HUME, David. An enquiry concerning human understanding. In: L. A. SELBY-BIGGE, M. A. Enquiries concerning the human understanding and concerning the principles of moral. 2. ed. London: Oxford University Press, 1973. § 15.

     by opening this new inlet for sensations, you also open an inlet for the ideas;