A large party; gala event.

"They had a big bash to celebrate their tenth anniversary."

An attack that consists of placing all one's weight into a downward attack with one's fists.

To strike heavily.

"He bashed himself against the door."

To collide.

"Don't bash into me with that shopping trolley."

To criticize harshly.

"He bashed my ideas."

To masturbate.

"He said that he bashes daily."

To abash; to disconcert or be disconcerted or put out of countenance.