Definition of crackling noun from the Oxford Advanced Learner's Dictionary

crackling

noun
ˈkræklɪŋ
 
; ˈkræklɪŋ
 
 
1 [uncountable, singular] a series of sharp soundsHe could hear the crackling of burning trees.2 [uncountable] (British English) (US cracklings [plural]) the hard skin of pork (= meat from a pig) that has been cooked in the oven