1) Animal sound 2) The sound of growling 3) Utterance 4) Vocalization 1) Growl 
Growling or growl is a low, guttural vocalization produced by predatory animals as a warning to others, as a sign of aggression, or to express anger. Low or dull rumbling noises may also be emitted by human beings when discontent with something or angry. The human sound is often termed `groaning`. Grrr /ˈɡɜrːː/ is an onomatopoeic word which.....[wind instruments] Woodwind growling is a musical technique where the instrumentalist vocalizes into the instrument to alter quality of the sound. Growling is used primarily in rock and blues style playing; it is popular in the woodwind family of instruments, especially the saxophone. It is commonly used by mainstream artists such as Ben We...
• (p. pr. & vb. e.) of Growl
[n] - a gruff or angry utterance (suggestive of the growling of an animal)
noun a gruff or angry utterance (suggestive of the growling of an animal)