Definition of Grissom, Gus in US English:

Grissom, Gus

proper noun

  • (1926–67), US astronaut; full name Virgil Ivan Grissom. Part of the original Project Mercury astronaut team in 1959, he was killed in a flash fire in the Apollo I capsule along with fellow astronauts Edward H. White (1930–67) and Roger B. Chaffee (1935–67).


Grissom, Gus