Fetching details from the dictionary...

to strike; to hit; to beat; to knock; to pound; to bang; to slap; to spank; to tap; to pat; to clap (one's hands); to play (the drums)
to attack; to bash; to criticize; to censure; to flame (on the Internet)
to sound out (someone's views)
to pound (meat or fish); to chop into small pieces
to beat down the price
to talk (big, bad, idly, etc.)
to call; to invoke (e.g. a function)
ドアを三回叩いて入室を求めた。
I knocked on the door and asked to enter.
ネットで政治家が叩かれている。
Politicians are being bashed online.
彼は怒ってテーブルを強く叩いた。
He angrily hit the table hard.