(1):

(n.) A very large glandular and vascular organ in the visceral cavity of all vertebrates.

(2):

(n.) One who, or that which, lives.

(3):

(n.) A resident; a dweller; as, a liver in Brooklyn.

(4):

(n.) One whose course of life has some marked characteristic (expressed by an adjective); as, a free liver.

(5):

(n.) The glossy ibis (Ibis falcinellus); - said to have given its name to the city of Liverpool.