せい 井 LinksSentence search for 井Sentence search for せいKanji details for 井Edit in JMdict Noun1. well curbRare, See also 井桁Noun2. Chinese "Well" constellation (one of the 28 mansions)Astronomy, See also 二十八宿, See also 朱雀 すざく Discussions Log in to talk about this word.