Rostrum/ˈrɑːstrəm/ Definition 1 of 3Pro Tip 1/3Public Speaking A rostrum is often used in formal events like conferences or debates. During the graduation ceremony, the principal spoke from the rostrum. Pro Tip 2/3Visibility Focus A speaker uses a rostrum to be seen clearly by the audience. He adjusted the microphone before speaking at the rostrum. Pro Tip 3/3Authority Symbol Standing at the rostrum can symbolize authority or expertise. At the town hall meeting, the mayor took her place at the rostrum.