noun. ['ˈkrækɪŋ'] the act of cracking something.
noun. ['ˈkrækɪŋ'] a sudden sharp noise.
adjective. ['ˈkrækɪŋ'] very good.
noun. ['ˈkrækɪŋ'] the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process).