thornnounmasculine/ɨʃˈpiɲu/mediumes·pi·nhoPortuguesEnglishEspanolFrancaisDefinitionA stiff, sharp-pointed, woody projection on the stem or other part of a plant.The rose bush has very sharp thorns.He got pricked by a bramble thorn.synpricklespineCommon collocationsrose thornthorn bushpricked by a thornIdiomatic expressionsa thorn in one's side (a source of continual annoyance)EtymologyDo latim 'spina'.Related wordsespinhosoespinhalespinheiroespinhar