something empty / ineffectual / false

by heart, from memory, by rote

empty; vain; sky

pretty, gorgeous, beautiful / clear, clean, pure / clean, not dirty / tidy, neat, everything put away / fair, impartial, of clear conscience

lip service; promising but empty talk / skillful completion of a task

a black-backed wagtail (Motacilla alba lugens)

pretty, beautiful

a star (luminous celestial body) / a star (concave polygon with regular, pointy protrusions and indentations, especially used as a symbol to rate quality) / (tarot) the Star / (loosely) a celestial body

one of the Twenty-Eight Mansions in the Chinese system of constellations / Short for シンガポール (Shingapōru): Singapore

(loosely, especially fiction) attached to names of planets