trainer

Universal Words noun 1 (also training shoe) (both BrE) (AmE sneaker) [usuallypl.] a shoe that you wear for sports or as a piece of informal clothing: a pair of trainers 2 a person who teaches people or animals to perform a particular job or skill well, or to do a particular sport: teacher trainers * a racehorse trainer * Her trainer had decided she shouldn't run in the race.