けいかい 境界 LinksSentence search for 境界Sentence search for けいかいSentence search for 経界Kanji details for 境 and 界Edit in JMdict Noun1. land boundary; border (between properties)Dated term, See also 境界 きょうかいOther forms経界 【けいかい】 Discussions Log in to talk about this word.