Translation

• to be revealed
• to come out (of the truth)
• chalk (for whitening walls)
• (old) wine cup
• (neologism c. 2021) healthcare worker or volunteer in full-body PPE (esp. during the COVID-19 pandemic) (from the 2014 Disney version of the Marvel Comics character Baymax, whose Chinese name is 大白)

Synonyms

• 水落石出, 真相大白

Examples

• 今天强盗大白天的就抢了另一家银行。
  The thieves knocked off another bank today in a daytime robbery.
• 在他的裁判下，真相终于大白。
  The truth finally came out at his trial.