/ ˈtreɪnə(r); NAmE / noun
1.
(also ˈtraining shoe ) (both BrE ) ( NAmE sneak·er ) [ usually pl. ] a shoe that you wear for sports or as informal clothing :
a pair of trainers
—see also cross-trainer
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.
—see also personal trainer