B1
a person who teaches skills to people or animals and prepares them for a job, activity, or sport
Dictionary examples:
The computer trainer spent most of his time turning machines off and on. (0.0)
The dolphin trainer accidentally taught the dolphins to splash only the rude tourists. (0.0)
The spy trainer's first lesson was how to pretend you're not a spy. (0.0)
a dog trainer (13.6)
They showed pictures of the horse and its trainer. (21.1)
a fitness trainer (23.6)