老ろう大だいMeanings1noun, na-adjectivegrowing old; old personobsolete termObsolete term for aging or an elderly person. Not used in modern Japanese; replaced by words like 老化 (aging) or 老人 (old person).「老ろう大だい」は古ふるい言こと葉ばで、今いまは「老ろう化か」や「老ろう人じん」と言いう。老大 is an old word; nowadays we say 老化 or 老人.