Yu⋅ri A⋅le⋅kse⋅ye⋅vich /ˈyʊəri ˌælɪkˈseɪəvɪtʃ;Russ.ˈyuryɪ ʌlyɪˈksyɛyɪvyɪtʃ/Show Spelled Pronunciation[yoor-ee al-ik-sey-uh-vich;Russ.yoo-ryi uh-lyi-ksye-yi-vyich]Show IPA, 1934–68, Russian astronaut: first human being to make an orbital space flight (1961).
Ga·ga·rin (gə-gär'ĭn) Soviet cosmonaut. In 1961 he became the first person to travel in space. He was killed while flying a routine aircraft training mission.