trainer
Americannoun
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a person or thing that trains.
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a staff member on an athletic team who gives first aid and therapy to injured players.
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a person who trains athletes; coach.
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a person who trains racehorses or other animals for contests, shows, or performances.
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an airplane or a simulated aircraft used in training aircrew members, especially pilots.
noun
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a person who trains athletes in a sport
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a piece of equipment employed in training, such as a simulated aircraft cockpit
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horse racing a person who schools racehorses and prepares them for racing
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(plural) an informal name for training shoes
Etymology
Origin of trainer
Explanation
A trainer is someone who teaches or coaches someone, like the trainer at the gym who promises that she'll have you ready to run a marathon in four months. Some trainers can teach you how to do sit ups, while others can instruct you to program a computer or be an effective leader. Dog trainers teach dogs to follow commands — and they teach dog owners to give commands effectively. The noun trainer comes from the verb train, "to discipline or teach," from an earlier sense, "to manipulate to bring a desired form," the way a gardener trains a rose to grow up a trellis.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Trainer Don Charles guaranteed Daniel Dubois' team will not be hosting a party before Saturday's fight against WBO heavyweight champion Fabio Wardley in Manchester.
From BBC • May 7, 2026
Trainer Brad Cox is horse racing’s leading trainer, but his only victory in the Run for the Roses came out of a disqualification.
From The Wall Street Journal • May 2, 2026
He has personally brokered Pokémon sales worth over £2m, including an £84,000 Pokémon Trainer, a £442,800 Charizard and an £832,000 Pikachu Illustrator.
From BBC • Apr. 16, 2026
Trainer Michael McCarthy didn’t have a starter in the Santa Anita Derby, one year after winning the race with Journalism.
From Los Angeles Times • Apr. 4, 2026
Trainer Conway stood on the sideline and watched his horse from afar as he circled around the course, legging up for the stout mile-and-three-sixteenths distance of the match.
From "Seabiscuit: An American Legend" by Laura Hillenbrand
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
