1. instances of a train leaving its tracks accidentally
2. instances of something being diverted from its intended course or purpose
Usage: figurative

Examples

• The railway company investigated several derailments that occurred last month.
• Safety inspectors work to prevent train derailments through regular track maintenance.
• The meeting suffered multiple derailments as participants kept changing the topic.
• Political derailments often occur when scandals shift focus from policy issues.
• The project experienced several derailments due to budget cuts and staff changes.
• News of the merger caused derailments in the company’s original expansion plans.