1.a batter strikes out in baseball by missing the ball three times, ending their turn at trying to hit it; a pitcher strikes a batter out in baseball by throwing three balls that the batter is unable to hit, ending the batter’s turn
2.to be unsuccessful in trying to do something
3.to try to hit or attack someone or something
4.to criticize someone or something, especially in a speech, interview, or article
5.to walk or swim in a particular direction in a way that shows energy or determination
6.to start doing something new or different, especially in order to become more independent
7.to remove words from a document, for example by drawing a line through them
strikes out