Real Dictionary

snarl
verb: When an animal snarls, it makes a fierce, rough sound in its throat while showing its teeth.

snarl in American English 1
to growl fiercely, baring the teeth, as a threatening dog
to utter or give vent to with a snarl
intransitive verb: to growl threateningly or viciously, esp. with a raised upper lip to bare the teeth, as a dog
noun: the act of snarling
transitive verb: to say by snarling

snarl in American English 2
to make (thread, hair, etc.) knotted or tangled
intransitive verb: to become tangled; get into a tangle
noun: a tangle, as of thread, hair, or wire
transitive verb: to bring into a tangled condition, as thread or hair

snarl in British English 1
noun: a vicious growl, utterance, or facial expression
verb: (of an animal) to growl viciously, baring the teeth

snarl in British English 2
noun: a tangled mass of thread, hair, etc
verb: to be, become, or make tangled or complicated