1. slang A shortening of "down low," referring to a state of secrecy or minimal public knowledge. Keep this on the DL, but Janet is planning to break up with Kevin next week. My parents know about the pregnancy, but I'd like it to stay on the DL otherwise.

2. slang A shortening of "down low," referring to a state of secrecy or minimal public knowledge pertaining to the activities of a man who has sex with other men but considers himself to be heterosexual. I never thought he was gay, but then I started to hear rumors that he's on the DL.

3. A shortening of "disabled list," which, in sports, is a list of players who cannot currently play due to injury. Well, our two best players are on the DL, so I'd say our playoff chances are looking grim.