what does pre trial statement means in the court of law?

Answer 1

It could mean almost anything, depending upon the context.

A pre-trial statement could be made by a defendant, as part of an allocution or preliminary hearing. It could be made in a civil case, at a motion hearing or by sworn declaration.

A pre-trial statement is a statement that is made as part of the court record (usually under oath) and that occurs before trial. Other than that, I can think of a dozen situations where it might occur.