coowner From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounSomeone who owns something together with one or more other people. Related wordsSynonymsjoint ownerco-founderco-authorco-directorco-editorcoöperatorco-operativecooperantco-producerco-ordinatorco-sponsorco-developerco-patronco-productioncolabourerexpartnerinheriter References Wiktionary — coowner Wikipedia — coowner