- a small light under the roof of an automobile or boat.
- a flashing light on the roof of an emergency vehicle, as a police car or ambulance.
Origin of dome light
First recorded in 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for dome light
He found a switch and pressed it, and a dome-light came into being.