What does the word 'disregard' mean?

Question

Question ATPL - Airline Transport Pilot license - IFR Communications

QuizVDS · Accepted Answer

Consider that transmission as not sent

QuizVDS · Answer

Wait and I will call you

QuizVDS · Answer

Annul the previously transmitted clearance

QuizVDS · Answer

An error has been made in this transmission

Id 90 - ATPL - What does the word 'disregard' mean?