/poh"steuhrn, pos"teuhrn/ , n.
1. a back door or gate.
2. a private entrance or any entrance other than the main one.
adj.
3. of, pertaining to, or resembling a postern.
[ 1250-1300; ME posterne posterle posterula, dim. of postera back door, n. use of fem. of posterus coming behind. See POSTERIOR, -ULE ]