vipernounfeminine/vi.ˈbɔ.ɾɐ/lowvi·bó·raPortuguesEnglishEspanolFrancaisDefinitionA venomous snake of the family Viperidae, with a thick body and triangular head.We saw a viper basking on the rock.The viper's venom is highly toxic.synadderpit viperCommon collocationsvenomous viperviper bitehorned viperEtymologyDo latim 'vipera'.Related wordsvíbora-cornudavíbora-de-seoane