cosmos1Pronunciation: /ˈkɒzmɒs/Translate cosmos | into German | into Italian | into Spanish Definition of cosmos noun (the cosmos) the universe seen as a well-ordered whole:he sat staring deep into the void, reminding himself of man’s place in the cosmos a system of thought:the new gender-free intellectual cosmosOrigin: Middle English: from Greek kosmos 'order or world'cosmos in other Oxford dictionaries Definition of cosmos in the US English dictionary