(1):
(n.) The fusion of a female germ cell (ovum) with a male germ cell (in animals, a spermatozoon) to form a single new cell endowed with the power of developing into a new individual; fertilization; fecundation.
(2):
(n.) The act of impregnating or the state of being impregnated; fecundation.
(3):
(n.) That with which anything is impregnated.
(4):
(n.) Intimate mixture; influsion; saturation.
(5):
(n.) An ore deposit, with indefinite boundaries, consisting of rock impregnated with ore.