A hollow place in the earth; an abyss; a deep chasm or basin.
That which swallows; the gullet.
That which swallows irretrievably; a whirlpool; a sucking eddy.
A portion of an ocean or sea extending into the land; a partially landlocked sea
A large deposit of ore in a lode.
A difference, especially a large difference, between groups.
(Oxbridge slang) The bottom part of a list of those awarded a degree, for those who have only just passed.
(Oxbridge slang) To award a degree to somebody who has only just passed sufficiently.