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
Anyone with information related to the case or whose dog died in the care of trainer Sit are asked to contact rsteen@cityofirvine.org.
—Jasmine Mendez, Los Angeles Times, 24 June 2025
The students were considering wiring configurations, screwing in cables and responding to questions from solar master trainer Sam Garrard.
—Nara Schoenberg, Chicago Tribune, 23 June 2025
When Lang offered a complimentary session with a trainer who specializes in American Sign Language, Boblit and Ziarko were eager to get started.
—Lila Hempel-Edgers, Charlotte Observer, 23 June 2025
After a quick check by the Royals’ trainers, Erceg remained in the game and got Adolis Garcia to hit into a 6-4-3 double play.
—Jaylon Thompson, Kansas City Star, 19 June 2025
See All Example Sentences for trainer
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Jasmine Mendez, Los Angeles Times, 24 June 2025
The students were considering wiring configurations, screwing in cables and responding to questions from solar master trainer Sam Garrard.
—Nara Schoenberg, Chicago Tribune, 23 June 2025
When Lang offered a complimentary session with a trainer who specializes in American Sign Language, Boblit and Ziarko were eager to get started.
—Lila Hempel-Edgers, Charlotte Observer, 23 June 2025
After a quick check by the Royals’ trainers, Erceg remained in the game and got Adolis Garcia to hit into a 6-4-3 double play.
—Jaylon Thompson, Kansas City Star, 19 June 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 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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