/ mɒnˈstrɒsəti; NAmE mɑːnˈstrɑːs-/ noun
( pl. -ies ) something that is very large and very ugly, especially a building
SYN eyesore :
a concrete monstrosity
••
WORD ORIGIN
mid 16th cent. (denoting an abnormality of growth): from late Latin monstrositas , from Latin monstrosus , from monstrum portent or monster, from monere warn.