在线词典月城即瓮城。城外所筑的半圆形的小城﹐作掩护城门﹐加强防御之用。拼音yuè chéng解释即瓮城。城外所筑的半圆形的小城﹐作掩护城门﹐加强防御之用。英文释义semicircular defensive enclosure around city gates; crescent-shaped barbican