Longman Dictionary of Contemporary English - coach

~1 n 1 »IN A SPORT« someone who trains a person or team in a sport  (a tennis coach)  (- see teach) 2 »IN A SCHOOL SUBJECT« especially BrE someone who gives special instruction to a student in a particular subject, especially so that they can pass an examination 3 »BUS« BrE a bus with comfortable seats used for long journeys; bus1 AmE  (We went to Paris by coach.) 4 »IN A TRAIN« BrE one of the parts of the train in which the passengers sit; car (3) AmE 5 »PULLED BY HORSES« a large carriage pulled by horses 6 »A CLASS OF TRAVEL« AmE the cheapest type of seats on a plane or train  (We flew coach out to Atlanta.) ~2 v 1 to teach a person or team the skills they need for a sport  (Nigel coaches a cricket team in his spare time.) 2 especially BrE to give someone special instruction in a particular subject, especially so that they can pass an examination  (coach sb in/for)  (Chorley had to be coached in most subjects for the first two terms.) 3 to give someone instruction in what they should say or do in a particular situation  (coach sb in sth)  (The Callaghan girl must be carefully coached in the story she will tell in court.)