Gulf /(gŭlf)/

Gulf

n.
  1. A hollow place in the earth; an abyss; a deep chasm or basin,
    He then surveyed Hell and the gulf between.
    Between us and you there is a great gulf fixed.
    — Luke xvi. 26.
  2. That which swallows; the gullet. [Obs.]
  3. That which swallows irretrievably; a whirlpool; a sucking eddy.
    A gulf of ruin, swallowing gold.
  4. A portion of an ocean or sea extending into the land; a partially land-locked sea; as, the Gulf of Mexico. (Geog.)
  5. A large deposit of ore in a lode. (Mining)

Phrases & Compounds

Gulf Stream
the warm ocean current of the North Atlantic.
Gulf weed
a branching seaweed (Sargassum bacciferum, or sea grape), having numerous berrylike air vessels, -- found in the Gulf Stream, in the Sargasso Sea, and elsewhere.