一いち丸がんいちがんCommon word›Freq.FrequencyTop 50,000Meanings1nounone lump; one united bodyAlmost exclusively used in the phrase 一丸となる or 一丸となって, meaning 'to unite as one' or 'to band together'. Not used as a standalone noun in modern Japanese.See also: 一丸となってチームが一いち丸がんとなって優ゆう勝しょう