What is the meaning of croak?

noun

• A harsh hoarse utterance (as of a frog.
  • synonyms: croaking

verb

• Pass from physical life and lose all bodily attributes and functions necessary to sustain life.
  • usage: "She died from cancer"; "The children perished in the fire"; "The patient went peacefully"; "The old guy kicked the bucket at the age of 102"
  • synonyms: die, decease, perish, go, exit, pass away, expire, pass, kick the bucket, cash in one's chips, buy the farm, conk, give-up the ghost, drop dead, pop off, choke, snuff it
• Utter a hoarse sound, like a raven.
  • synonyms: cronk
• Make complaining remarks or noises under one's breath.
  • usage: "she grumbles when she feels overworked"
  • synonyms: murmur, mutter, grumble, gnarl