This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Thermal decomposition, sometimes with catalysis, of a complex substance, especially the breaking of petroleum molecules into shorter molecules to extract low-boiling fractions such as gasoline.

adj. Excellent; great: had a cracking time at the dance.

ad. Used as an intensive: a cracking good show.

n. The thermal decomposition of a substance, especially that of crude petroleum in order to produce petrol / gasoline.

n. The formation of cracks on a surface

adj. Great

adj. Enjoyable.

ad. Very, usually associated with praise.

v. Present participle of crack.

n. the act of cracking something.

n. the process of making lower molecular weight hydrocarbons from heavier hydrocarbons in petroleum, by exposure to heat and catalysts. It is used to convert heavier alkanes into gasoline, or to improve the octane number of an alkane mixture.

adj. same as groovy, sense 1.

n. The act of breaking; a breaking or snapping.

n. A more or less loud sound of breaking or snapping; a resounding noise.

n. A process by which a compound made up of elements of varying volatility may be analyzed and the components separated by successively raising the temperature of the mixture, so that they are distilled off successively in the order of their volatility: used specifically of petroleum compounds, which in the refining process are separated by increasing the temperature of distillation.

adj. very good

n. the act of cracking something

n. the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process)

n. a sudden sharp noise

"He made his name cracking down on drug cartel violence in his home state of Baja California by forging close cooperation between military and civilian law-enforcement officials."

good   

break    breaking    breakage    noise   

groovy   

get cracking   

fracture    crack    bang-up    bully    cool    corking    dandy    great    groovy    keen   

crack   

attacking    backing    hacking    jacking    lacking    packing    racking    sacking    smacking    snacking