A rostrum is an elevated platform where someone stands to speak to an audience. When a conductor leads an orchestra, she stands on a rostrum so musicians can see her clearly. When someone gives a speech at a ceremony, they often step up to a rostrum so everyone in the room can see and hear them better.

Today, when you picture a debate, an awards ceremony, or a classical music concert, you're likely imagining someone standing at a rostrum. It's similar to a podium or lectern, though technically a podium is any raised platform (you stand on a podium), while a rostrum specifically refers to a speaker's platform. A lectern is the stand that holds your notes.

The plural can be either rostrums or rostra. When someone takes the rostrum, they're stepping up to address an audience, suggesting a moment of importance and formality.