A monster is any of a large number of legendary creatures that usually appear in mythology, legend, and horror fiction. The word originates from the ancient Latin monstrum, meaning "omen", from the root of monere, "to warn", and also meaning "prodigy"...

Monstrous Regiment (novel)

Monstrous Manual, see Monster Manual

Monstrous moonshine, a mathematical term describeing connection between the monster group M and modular functions

Monstrous humanoid, a creature type in the Dungeons & Dragons fantasy role-playing game

Monstrous Regiment

Monstrous carbuncle, a term used to describe modernist architecture which is unsympathetic to its surroundings