(1921–2016), US astronaut and politician; full name John Herschel Glenn, Jr. In 1962, he became the first American to orbit the earth. An Ohio Democrat, he served four terms in the US Senate 1975–99. In 1998, in his late 70s, he joined the crew of the space shuttle Discovery in order to help study the effects of space travel on older people.
Definition of Glenn, John in US English:
Glenn, John
proper nounɡlen
(1921–2016), US astronaut and politician; full name John Herschel Glenn, Jr. In 1962, he became the first American to orbit the earth. An Ohio Democrat, he served four terms in the US Senate 1975–99. In 1998, in his late 70s, he joined the crew of the space shuttle Discovery in order to help study the effects of space travel on older people.