a comfortably equipped single-decker bus used for longer journeys

a coach trip

a railway carriage

a closed horse-drawn carriage

travel by coach

fly or coach to the shores of the Mediterranean

in economy class accommodation in an aircraft or train

many employees are now flying coach instead of business class to Europe

an instructor or trainer in sport

a football coach

the coach of the Canadian team

train or instruct (a team or player)

he moved on to coach the England team