安あん貞ていあんていMeanings1nounAntei era (1227.12.10-1229.3.5)Japanese era name (年号) from the Kamakura period. Used only in historical contexts.安あん貞てい年ねん間かんに起おきた出で来き事ごとを調しらべています。I'm researching events that occurred during the Antei era.