What is Coach ?
Coach is (noun) 1. a large bus for travelling long distances There’s an hourly coach service to Oxford. They went on a coach tour of southern Spain. The coach driver fell asleep while driving. 2. a passenger carriage on a train The first four coaches are for Waterloo. 3. US a category of seat on a plane which is cheaper than first class We went coach to Washington. 4. a person who trains sportsmen, etc. The coach told them that they needed to spend more time practising. He’s a professional football coach. (NOTE: The plural is coaches.)(verb) 1. to train sportsmen or sportswomen She was coached by a former Olympic gold medallist. 2. to give private lessons to someone All the actors had to be coached separately.
source: Easier English, Student Dictionary Upper Intermediate Level