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
As a trainer with a very worldly resume, Yahagi has played a major role in elevating the Japanese racing brand around the globe.
—Danny Brewer, Forbes.com, 6 July 2025
Fine is a 32-year-old celebrity fitness trainer who rides bulls, according to the New York Post.
—David Wysong, The Enquirer, 2 July 2025
Now here are today's top stories: Legendary horse trainer D. Wayne Lukas has died at age 89, according to a statement from his family.
—Leo Bertucci, The Courier-Journal, 2 July 2025
Studies show that people who work with personal trainers see better results than those who go it alone.
—Fred Sassani, Austin American Statesman, 2 July 2025
See All Example Sentences for trainer
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Danny Brewer, Forbes.com, 6 July 2025
Fine is a 32-year-old celebrity fitness trainer who rides bulls, according to the New York Post.
—David Wysong, The Enquirer, 2 July 2025
Now here are today's top stories: Legendary horse trainer D. Wayne Lukas has died at age 89, according to a statement from his family.
—Leo Bertucci, The Courier-Journal, 2 July 2025
Studies show that people who work with personal trainers see better results than those who go it alone.
—Fred Sassani, Austin American Statesman, 2 July 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 18 Jul. 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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