1
: a person who trains someone or something: such as
a
: one whose occupation is to guide or instruct people in fitness and exercise routines
a personal trainer
When we run the track, Stan Ward, a boxing and conditioning trainer, times us.—
Bridgett Riley
Bridgett Riley
b
: one who oversees the training of animals
a dog/horse trainer
A trainer uses the clicker to create an auditory cue that marks a particular behavior and then rewards the dog with a treat.—C. C. Holland
C. C. Holland2
: a person who treats the ailments and minor injuries of the members of an athletic team
… he landed so hard that the wind was knocked out of him. He lay writhing on the ground as Herm Schneider, the team trainer, rushed to his side.—William Nack
William Nack3
: something (such as a machine or vehicle) used in training see also elliptical trainer
4
chiefly British
: sneaker sense 2
They wore trainers, scuffed and old, with the laces loose and the tongues protruding in defiance at the ankle.—M. J. Trow
M. J. TrowExamples of trainer in a Sentence
the boxer and his trainer
She hired a personal trainer.
Recent Examples on the Web
Commenters argued her outfit definitely wouldn't be appropriate for a corporate position, but Carreño tells PEOPLE there's a wide range of outfits going on at her workplace: jeans, cargo shorts and trainers, to button-ups, polos and slacks.
—Rachel Raposas, People.com, 31 May 2025
The spring/summer 2025 collection, launching on May 28, is the first time Wales Bonner has debuted a completely original trainer design, the Karintha.
—Alice Cary, Vogue, 28 May 2025
Positive reinforcement is the most popular training method among animal owners, supported by most veterinarians and animal trainers because of its soft nature.
—Maria Azzurra Volpe, MSNBC Newsweek, 25 May 2025
He was attended to by trainers and given towels before plugging his nose to stop the bleeding.
—Ryan Morik, FOXNews.com, 23 May 2025
See All Example Sentences for trainer
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Rachel Raposas, People.com, 31 May 2025
The spring/summer 2025 collection, launching on May 28, is the first time Wales Bonner has debuted a completely original trainer design, the Karintha.
—Alice Cary, Vogue, 28 May 2025
Positive reinforcement is the most popular training method among animal owners, supported by most veterinarians and animal trainers because of its soft nature.
—Maria Azzurra Volpe, MSNBC Newsweek, 25 May 2025
He was attended to by trainers and given towels before plugging his nose to stop the bleeding.
—Ryan Morik, FOXNews.com, 23 May 2025
See All Example Sentences for trainer
Cite this Entry
“Trainer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trainer. Accessed 3 Jun. 2025.
Copy CitationKids Definition
trainer
noun
train·er
ˈtrān-ər 
1
: one that trains
2
: a person who treats the minor ailments and injuries of the members of an athletic team
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