Yuri Gagarin yu·ri·ga·garin uncommon noun 1. Soviet cosmonaut who in 1961 was the first person to travel in space (1934-1968) SynonymsGagarinYuri GagarinYuri Alekseyevich Gagarin Related words Broader terms astronaut WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
