不定
búdìng
not fixed; unsettled
Every meaning
bùdìng
- not fixed; unsettled
- maybe; there's no telling (不定哪天)
- (grammar) indefinite
Its characters
Words with 不
Words with 定
Meanings are from Mandarin The Wild’s own dictionary. Levels follow the official HSK word list (the exam’s 2025 syllabus, levels 7–9 shown together).