(1):

(n.) That which swallows irretrievably; a whirlpool; a sucking eddy.

(2):

(n.) That which swallows; the gullet.

(3):

(n.) A hollow place in the earth; an abyss; a deep chasm or basin,

(4):

(n.) A portion of an ocean or sea extending into the land; a partially land-locked sea; as, the Gulf of Mexico.

(5):

(n.) A large deposit of ore in a lode.