Definition of holocausts:
(n) :
(by extension) (figuratively) Extensive destruction of a group of animals or (especially) people; a large-scale massacre or slaughter.
(n) :
(by extension) Complete destruction by fire; also, the thing so destroyed.
(v) :
To destroy (something) completely, especially by fire.
(n) :
(religion) An offering or sacrifice to a deity that is completely burned to ashes.
(n) :
(by extension) (religion, also figuratively) A complete or large offering or sacrifice.
(v) :
(religion, also figuratively) To sacrifice (chiefly an animal) to be completely burned.