If you were dreaming of elevator, it is the same as a dream of lift. In the United States of America and other countries who use American English, the elevator is the mechanical box that takes up up or down a narrow shaft. This elevator stops at floors, so that you don’t have to walk from one level to the next floor.
In British English, the lift is the mechanical box that carries people and goods, from one storey of the building, to another storey. Using a lift means you don’t have to climb stairs.
If you dream of the elevator/ lift, it can mean you’re given a boost to reach a different level of the building, instead of the slower way of self-propelled walking and climbing stairs. The dream interpretation is that you’ll be given some help in your real life.