Definitions

1. verb

to cause (a train, vehicle, or course of action) to leave its tracks or intended course

“The accident derailed the entire production schedule.”

2. verb

to prevent or stop something from happening or continuing

“The new policy may derail the company’s plans for expansion.”

3. noun

an event or action that causes (a train, vehicle, or course of action) to leave its tracks or intended course

“The derailment caused a major delay in the train’s journey.”

4. noun

a deviation or change from a planned or intended course of action

“The derailment of the project’s budget led to its cancellation.”