- 五大三粗 wǔdàsāncū burly(colloquial) big and strong; strapping; describes someone with a sturdy build and great strength
- 百慕大三角 bǎimùdàsānjiǎo Bermuda Trianglethe Bermuda Triangle
- 大三元 dàsānyuán triple crown(literary) collective name for the highest-ranking graduates of the three levels of imperial examinations in ancient China, specifically the [[解元|解元|jie4 yuan2]], [[会元|會元|hui4 yuan2]], and [[状元|狀元|zhuang4 yuan2]]
- 大三和弦 dàsānhéxián major triadmajor triad; a chord consisting of a root, a major third, and a perfect fifth
- 大三度 dàsāndù major thirda musical interval spanning four semitones