Glenn glenn • glenn curtiss · · · Info · Definitions · Characters · · Glenn · · Text Latin · · Script 5 · · Length 1 · · Syllables Definitions · · · (noun) made the first orbital rocket-powered flight by a United States astronaut in 1962; later in United States Senate (1921-). Synonyms: John Glenn, John Herschel Glenn Jr.. · · Noun Definition 1 Characters · · G latin capital letter g U+0047 e latin small letter e U+0065 l latin small letter l U+006C n latin small letter n U+006E