Trainer/ˈtreɪnər/ Definition 1 of 3Pro Tip 1/3Context Matters Use 'trainer' for professionals guiding others in specific domains like sports or skills. My piano trainer is preparing me for the concert. Pro Tip 2/3Not a Teacher 'Trainer' suggests hands-on guidance, unlike 'teacher' which is more academic. She hired a dog trainer, not a dog teacher. Pro Tip 3/3Specialization Trainers often specialize in a field, such as fitness or career development. I'm looking for a specialized language trainer.