lighten Pronunciation: /ˈlaɪtṇ/Translate lighten | into French | into German | into Italian Spanish translation of lightenA. vt 1 [load/workload] aligerar; [responsibility/conscience] descargar* 2 a [room] dar* más luz a; [sky] iluminar b [color/hair] aclararB. vi 1 [load/weight] hacerse* más ligero or (esp AmL) liviano, aligerarse 2 [sky] despejarse; [face] iluminarse; [atmosphere] relajarsePhrasal verbs lighten up v + adv (colloq) relajarselighten in other Oxford dictionaries Definition of lighten in the British & World English dictionary Definition of lighten in the US English dictionary