Meaning of 800-POUND GORILLA in English

800-POUND GORILLA

Pronunciation: ' ā t- ' h ə n-dr ə d- ' pau ̇ nd-, -d ə rd-

Function: noun

: one that is dominating or uncontrollable because of great size or power <like it or not, the 800-pound gorilla usually sets the standard ― Daya Nadamuni>

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.