High-time

Full definition of high-time

Adjective

1. (mechanical engineering, especially aviation, of a vehicle or mechanical component) Having been in use for a (relatively) long time or a large number of operating cycles; nearing retirement or replacement age.
• 13 March 2002, National Transportation Safety Board, Aircraft Accident Brief: EgyptAir Flight 990, Boeing 767-366ER, SU-GAP, 60 Miles South of Nantucket, Massachusetts, October 31, 1999 Chapter 767 Bellcrank Anomalies