実じっ兄けいじっけいCommon word›Freq.FrequencyTop 100,000Meanings1nounbiological older brother; real older brotherUsed to specify a blood-related older brother, as opposed to a brother-in-law (義兄) or a sworn brother. Common in family registers, formal introductions, and when clarifying family relationships.彼かれは私わたしの実じっ兄けいです。He is my biological older brother.