大おお溝どぶMeanings1nounlarge ditchrare termRare term for a large ditch or trench. More commonly expressed as 大きな溝 (おおきなみぞ) or 大溝 (おおみぞ).古ふるい地ち図ずには、城しろの周まわりに大おお溝どぶが描えがかれている。On the old map, a large ditch is drawn around the castle.