Brake/breɪk/ Definition 1 of 5Pro Tip 1/3Vehicle Safety The term 'brake' is crucial when talking about driving and vehicle control. Always check your brakes before a long trip. Pro Tip 2/3Emergency Stop 'Brake' often refers to the action taken to avoid accidents. He slammed on the brake to avoid hitting the deer. Pro Tip 3/3Metaphoric Use Sometimes used metaphorically to mean slowing down or stopping an activity. She put the brakes on her spending.