柯林斯詞典space probe (space probes) 1. N-COUNT A space probe is a spacecraft with no people in it which is sent into space in order to study the planets and send information about them back to earth. (無人)航天探測器 返回 space probe劍橋詞典a small spacecraft , with no one travelling in it, sent into space to make measurements and send back information to scientists on earth 航天探測器 返回 space probe