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
In 2010, after the orca Tilikum caused the death of a SeaWorld trainer, OSHA cited SeaWorld for violations of the General Duty Clause.
—Chris Deubert, Forbes.com, 16 July 2025
Now a personal trainer and fitness influencer, Bautista connected with Gallardo over social media a few years ago.
—Kelly Meyerhofer, jsonline.com, 15 July 2025
Manager Alex Cora and a trainer immediately rushed out from the dugout.
—Gabrielle Starr, Boston Herald, 12 July 2025
When not in use, the whole rig can be disconnected from the trainer by hand, then hung up on the wall via an integrated hanger.
—New Atlas, 12 July 2025
See All Example Sentences for trainer
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Chris Deubert, Forbes.com, 16 July 2025
Now a personal trainer and fitness influencer, Bautista connected with Gallardo over social media a few years ago.
—Kelly Meyerhofer, jsonline.com, 15 July 2025
Manager Alex Cora and a trainer immediately rushed out from the dugout.
—Gabrielle Starr, Boston Herald, 12 July 2025
When not in use, the whole rig can be disconnected from the trainer by hand, then hung up on the wall via an integrated hanger.
—New Atlas, 12 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 22 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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