Crack (krăk), v. t. [imp. & p. p. Cracked (krăkt); p. pr. & vb. n. Cracking.] [OE. cracken, craken, to crack, break, boast, AS. cracian, cearcian, to crack; akin to D. kraken, G. krachen; cf. Skr. garj to rattle, or perh. of imitative origin. Cf. Crake, Cracknel, Creak.]
[1913 Webster]

1. To break or burst, with or without entire separation of the parts; as, to crack glass; to crack nuts.
[1913 Webster]

2. To rend with grief or pain; to affect deeply with sorrow; hence, to disorder; to distract; to craze.
[1913 Webster]

O, madam, my old heart is cracked. Shak.
[1913 Webster]

He thought none poets till their brains were cracked. Roscommon.
[1913 Webster]

3. To cause to sound suddenly and sharply; to snap; as, to crack a whip.
[1913 Webster]

4. To utter smartly and sententiously; as, to crack a joke. B. Jonson.
[1913 Webster]

5. To cry up; to extol; -- followed by up. [Low]
[1913 Webster]

To crack a bottle, to open the bottle and drink its contents. -- To crack a crib, to commit burglary. [Slang] -- To crack on, to put on; as, to crack on more sail, or more steam. [Colloq.]
[1913 Webster]

Crack, n. 1. A partial separation of parts, with or without a perceptible opening; a chink or fissure; a narrow breach; a crevice; as, a crack in timber, or in a wall, or in glass.
[1913 Webster]

2. Rupture; flaw; breach, in a moral sense.
[1913 Webster]

My love to thee is sound, sans crack or flaw. Shak.
[1913 Webster]

3. A sharp, sudden sound or report; the sound of anything suddenly burst or broken; as, the crack of a falling house; the crack of thunder; the crack of a whip.
[1913 Webster]

Will the stretch out to the crack of doom? Shak.
[1913 Webster]

4. The tone of voice when changed at puberty.
[1913 Webster]

Though now our voices
Have got the mannish crack. Shak.
[1913 Webster]

5. Mental flaw; a touch of craziness; partial insanity; as, he has a crack.
[1913 Webster]

6. A crazy or crack-brained person. [Obs.]
[1913 Webster]

I . . . can not get the Parliament to listen to me, who look upon me as a crack and a projector. Addison.
[1913 Webster]

7. A boast; boasting. [Obs.] “Crack and brags.” Burton. “Vainglorius cracks.” Spenser.
[1913 Webster]

8. Breach of chastity. [Obs.] Shak.
[1913 Webster]

9. A boy, generally a pert, lively boy. [Obs.]
[1913 Webster]

Val. 'T is a noble child. Vir. A crack, madam. Shak.
[1913 Webster]

10. A brief time; an instant; as, to be with one in a crack. [Eng. & Scot. Colloq.]
[1913 Webster]

11. Free conversation; friendly chat. [Scot.]
[1913 Webster]

What is crack in English? . . . A crack is . . . a chat with a good, kindly human heart in it. P. P. Alexander.
[1913 Webster]

12. a witty remark; a wisecrack.
[PJC]

13. a chance or opportunity to do something; an attempt; as, I'll take a crack at it.
[PJC]

14. a form of cocaine, highly purified and prepared as small pellets, especially suitable for smoking; -- also called rock. Used in this form it appears to be more addicting than cocaine powder. [slang]
[PJC]