Function: intransitive verb
Date: 1707
1 : to enter upon a course of action
2 : to set out vigorously
3 : to make an out in baseball by a strikeout
4 : to finish bowling a string with consecutive strikes specifically : to bowl three strikes in the last frame
5 : FAIL 2C
transitive verb of a baseball pitcher : to retire (as a batter) by a strikeout