deras — meaning in English Swedish → English · translate English → Swedish instead English meaning their det Belonging to them. theirs pron The thing or things belonging to them (used without a following noun). Senses deras is used for these senses in English: their Belonging to, from, of, or relating to, them (plural). theirs That or those belonging to them; the possessive case of they, used without a following noun. Related Swedish words sin sitt sina hens