universe
/ˈju:nɪvɜ:s; `junəˌvəs/ n
1 the universe [sing]all existing things, including the earth and its creatures and all the stars, planets, etc in space 宇宙; 世界; 天地万物.
2 [C] system of galaxies 星系; 银河系
Are there other universes outside our own? 在我们的银河系之外还有别的星系吗?