Alan Shepard Alan Shepard /ˈælən ˈʃɛpərd/

noun

1. Astronaut who made the first United States' suborbital rocket-powered flight in 1961 (1923-1998)  ( Alan Bartlett Shepard Jr. , Alan Shepard , Shepard )
   astronaut who made the first United States' suborbital rocket-powered flight in 1961 (1923-1998)