The light of day; sunlight. Daybreak. Daytime. Exposure to public notice: corrupt business practices that were finally brought into the daylight. Understanding or insight into what was formerly obscure: new evidence that gave the researchers some daylight into the matter. Sports An opening, as between defensive players, especially one providing an opportunity for action: The running back found some daylight and gained six yards. Slang One's wits: "His adventurism had scared the daylights out of them\u201d ( Frederick Forsyth). see daylight To make sufficient progress so that completion of a project seems possible.