What is the meaning of Kowtow?

To kneel and bow low enough to touch one’s forehead to the ground.

To grovel, act in a very submissive manner; to show obeisance to (someone or something) in such a manner; to bow.

To bow very deeply.

The act of kowtowing.

kowtow (bow low enough to touch one’s forehead to the ground)

Source: wiktionary.org