1. a process of adjusting and maintaining a vehicle’s engine to improve its performance
2. a session of practice or preparation to improve performance

Examples

• My car needs a tuneup before the long road trip.
• The mechanic recommended a tuneup every 30,000 miles.
• After the tuneup, the engine ran much more smoothly.
• The band scheduled a tuneup before their big concert.
• She did a few practice problems as a tuneup for the exam.
• The team’s tuneup game helped them prepare for the playoffs.