(1):
(n.) The noise of slight and frequent cracks or reports; a crackling.
(2):
(n.) A kind of crackling sound or r/le, heard in some abnormal states of the lungs; as, dry crackle; moist crackle.
(3):
(n.) A condition produced in certain porcelain, fine earthenware, or glass, in which the glaze or enamel appears to be cracked in all directions, making a sort of reticulated surface; as, Chinese crackle; Bohemian crackle.
(4):
(v. i.) To make slight cracks; to make small, sharp, sudden noises, rapidly or frequently repeated; to crepitate; as, burning thorns crackle.