Definition from Wiktionary, the free dictionary
- Particles of matter that fall from space down to Earth
- (figuratively) a powder with supposedly magic qualities
- My sister's eyes were full of stardust, and she'd spend hours lazily planning her future life when she would make her big break in the movies.
- (informal, dated, astronomy) A distant cluster of stars, resembling a cloud, the individual stars of which cannot be resolved.
- (particles): cosmic dust