the part of morning when light first appears in the sky.
First light; the start of sunrise (1923+)
Very early morning, daybreak. For example, I got up at the crack of dawn. The crack in this term alludes either to the suddenness of sunrise or to the small wedge of light appearing as the sun rises over the horizon. Originally the term was usually put as crack of day. [ Late 1800s ]
noun 1. the signal that announces the Day of Judgment. 2. the end of the world; doomsday.
- Crack on someone
verb phrase To insult someone; dis, dump on, trash (1990s+ Black)
[krak-pot] /ˈkrækˌpɒt/ Informal. noun 1. a person who is eccentric, unrealistic, or fanatical. adjective 2. eccentric; impractical; fanatical: crackpot ideas. /ˈkrækˌpɒt/ noun 1. an eccentric person; crank adjective 2. (usually prenominal) eccentric; crazy n. “mentally unbalanced person,” by 1900, probably from crack + pot (n.1) in a slang sense of “head.” Cf. crack-brain “crazy fellow” […]
- Crack root
security, jargon To defeat the security system of a Unix machine and gain root privileges thereby. The sort of thing a cracker wants to do. [Jargon File] (2010-02-04)