In cricket, the term "knock" has two different meanings:

1. To knock a bat or knocking a bat is a popular term which means striking the surface of a bat with a cricket ball or with a special mallet. The result is a more compact and durable bat that can withstand the impact of a cricket ball in play.

2. A knock is a term used in cricket to refer to a batsmans individual performance during an innings. It is determined by the number of runs the batsman scores.

Therefore, the meaning of "knock" in cricket depends on the context in which it is used.