Word: Postern
Part of Speech: Noun
Basic Definition: A postern is a small gate or door located at the back or side of a fort, castle, or similar structure. It is usually less prominent than the main entrance and can be used for various purposes, such as allowing people or goods to enter or exit without being seen.
In summary, "postern" is a specific term referring to a small gate, typically found at the back of a castle or fort.