(1):
(n.) That which oppresses; a hardship or injustice; cruelty; severity; tyranny.
(2):
(n.) The act of oppressing, or state of being oppressed.
(3):
(n.) A sense of heaviness or obstruction in the body or mind; depression; dullness; lassitude; as, an oppression of spirits; an oppression of the lungs.
(4):
(n.) Ravishment; rape.