Definition: Meaning of, Mercury program, the in English to English dictionary.
Pronunciation:/ ˈməːkjʊri ˈprəʊgræm ðə;ðɪ;ðiː /
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(1961-63) a US government space programme designed to put human beings in ORBIT around the Earth. In its first successful flight, John GLENN made three ORBITs of the Earth in 1962.