Definitions

1. verb

to make a deep, hoarse sound, typically a loud, sudden sound, as a frog or toad does when it is dying or mating

“The frog let out a loud croak as the sun set over the pond.”

2. noun

the sound made by a frog or toad

“The croak of the bullfrog filled the evening air.”

3. verb (transitive)

to speak or utter in a hoarse or rough voice

“He croaked loudly into the microphone, causing the audience to cover their ears.”