The definition of creak is to make a slow, high-pitched squeaky noise.(verb)
An example of creak is to make a sound while walking on a loose wooden board in the floor.
See creak in Webster's New World College Dictionary
Origin: ME creken, to make a sound like geese, crows, etc.; echoic var. of croken: see croak
See creak in American Heritage Dictionary 4
intransitive verb creaked, creak·ing, creaks
Origin: Middle English creken, croak, complain
Origin: , of imitative origin.
Learn more about creak