trainer

noun

train·​er ˈtrā-nər 

plural trainers

1

: a person who trains someone or something: such as

a

: someone who oversees the training of people in a specific discipline

When we run the track, Stan Ward, a boxing and conditioning trainer, times us.

—Bridgett Riley

especially : personal trainer

A good trainer does more than count your biceps curls: She suggests the best types of exercises for your goal … and teaches you how to do the moves correctly.

—Sarah Bowen Shea

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

2

: athletic trainer

… 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

3

: 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

Synonyms of trainer

• coach
• manager

Examples of trainer in a Sentence

the boxer and his trainer

She hired a personal trainer.

Recent Examples on the Web

Along with the saints found on El Mencho’s altar, another saint embraced in narco culture is the Santo Niño of Atocha, a childlike Christ figure known as the patron saint of prisoners and those in danger, said Robert Almonte, a law enforcement trainer and consultant in San Antonio, Texas. —Marc Ramirez, USA Today, 7 June 2026

By contrast, William Mott’s Chief Wallabee’s role in the race can be boosted by his post position, and the trainer has added blinkers this evening to help his athlete’s concentration when the going gets tough. —Guy Martin, Forbes.com, 6 June 2026

If Golden Tempo follows in Sovereignty’s footsteps — or hooves in this case — DeVaux will become the first female trainer to win multiple legs of the Triple Crown in the same year. —Ryan Canfield, FOXNews.com, 6 June 2026

Saratoga Spring, New YorkAP — Golden Tempo won the 158th running of the Belmont Stakes on Saturday, capturing the third leg of the Triple Crown five weeks after winning the Kentucky Derby and making more history for trainer Cherie DeVaux. —CNN Money, 6 June 2026

Word History

First Known Use

1543, in the meaning defined at sense 1

Phrases Containing trainer

• athletic trainer
• cross-trainer
• elliptical trainer
• personal trainer

Rhymes for trainer

• gainer
• plainer
• planar
• planer
• saner
• stainer
• strainer
• abstainer
• campaigner
• complainer
• container
• coplanar

Kids 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