Broken so that cracks appear on, or under, the surface. / Broken into coarse pieces. / (of a voice) Harsh or dissonant. / (slang) Extremely good at something (usually a video game).

simple past tense and past participle of crack

(idiomatic) A problem that is challenging to solve. / (idiomatic, by extension) A situation, person, group, etc. which is difficult to deal with.

(intransitive, idiomatic, often with 'with') To continue at a task briskly or promptly. / To continue apace. / (transitive, dated) To put on.

(chemistry) The thermal decomposition of a substance, especially that of crude petroleum in order to produce petrol / gasoline. / The formation of cracks on a surface. / The production of a crack sound.

That cracks; that produces a sharp sound as of something splitting or breaking. / (colloquial) Great. / (colloquial) Enjoyable.

(Britain) Very, usually associated with praise.

present participle of crack

A decapod crustacean (not a true crab) from the superfamily Paguroidea, which salvages empty seashells or other portable objects to permanently shelter and protect its soft abdomen.

(chemistry) a substitution reaction in which an alkyl or acyl functional group replaces a hydrogen atom of an aromatic nucleus; it is catalyzed by aluminium chloride