TACE IS LATIN FOR A CANDLE, phr. (old).A cant phrase in the 18th century suggesting the expediency of silence. [Latin, tacēre. GROSE.]
1710. SWIFT, Polite Conversation, ii. Brandy is Latin for a Goose, and TACE IS LATIN FOR A CANDLE.
1751. FIELDING, Amelia, I. x. TACE, madam, answered Murphy, IS LATIN FOR A CANDLE: I commend your prudence.