じいちゃん grandfather Meanings also 爺ちゃん · 祖父ちゃん noun, familiar, usually in kana grandfather usually in kana male senior-citizen In sentences Furigana 僕ぼくのひいじいちゃんです。 This is my great-grandfather. #13028850 ここね、じいちゃんちなんだ。 This is my grandparents' house. #11853669