(1):

(n.) One who quakes.

(2):

(n.) The sooty albatross.

(3):

(n.) The nankeen bird.

(4):

(n.) Any grasshopper or locust of the genus (Edipoda; - so called from the quaking noise made during flight.

(5):

(n.) One of a religious sect founded by George Fox, of Leicestershire, England, about 1650, - the members of which call themselves Friends. They were called Quakers, originally, in derision. See Friend, n., 4.