trainer

noun7

1. •
   A person who trains another; a coach.

   • It was [Roger] Federer’s ability to pull him around the court that put the lactic acid and debilitating weight in those legs and he should not have been allowed the luxury of his trainer’s help. — 2012
2. •
   (UK, Ireland) A running shoe or sneaker.
3. •
   [before a noun] Attributive form of trainers.

   • There was chewing gum stuck to my trainer soles.
4. •
   A person responsible for treating injuries sustained by players during matches; a physiotherapist.

   • He served Nelson wholeheartedly as a player, coach and trainer in a lengthy association, the highlights being his involvement in two championship-winning sides. — 2009
5. •
   A piece of indoor equipment allowing a bicycle to be ridden while stationary.
6. •
   (slang) A patch for a video game that applies cheats.

   • Are there any sites that have original copies of games? (ie: Summer/Winter/World Games with Fast Loading). Just looking for games without the trainers/intros. — 2001
7. •
   A device for encouraging the roots of a plant to grow in a certain direction.