specialist

noun

spe·​cial·​ist ˈspe-sh(ə-)list 

1

: one who specializes in a particular occupation, practice, or field of study

a specialist in disorders of the immune system

a specialist in international law

"What does Dr. James Mortimer, the man of science, ask of Sherlock Holmes, the specialist in crime?"

—Arthur Conan Doyle

2

: an enlisted rank in the U.S. Army corresponding to the grade of corporal

also : any of several former enlisted ranks corresponding to the grades of sergeant through sergeant major

3

: an organism (such as a bird) specialized especially in food or habitat

specialist adjective

or specialistic

ˌspe-shə-ˈli-stik 

Examples of specialist in a Sentence

She consulted a marketing specialist when she decided to go into business.

He saw a specialist for his foot problem.

Recent Examples on the Web

Indonesian creatives and cultural specialists will work alongside Historyverse’s IP development team, using production tools Galleri5 built in India. — Naman Ramachandran, Variety, 25 Oct. 2026

Advanced care specialists at the zoo are able to capture data about kangaroo development through voluntary pouch checks, the zoo said. — Kendrick Calfee, Kansas City Star, 24 Oct. 2026

But even the most sophisticated diagnostic tools cannot improve outcomes if patients cannot access the specialists and health care systems equipped to use them. — Bruce Bebo, STAT, 24 Oct. 2026

If a treatment isn’t helping or is causing significant side effects, an MS specialist can reassess the approach and help identify a more appropriate medication, Ransohoff added. — Melissa Rudy, FOXNews.com, 24 Oct. 2026

Word History

First Known Use

1836, in the meaning defined at sense 1

Phrases Containing specialist

• specialist shop
• sub-specialist

Kids Definition

specialist

noun

spe·​cial·​ist ˈspesh-(ə-)ləst 

1

: a person who studies or works at a special occupation or branch of learning

an eye specialist

2

: an enlisted person in the army with a rank similar to that of corporal

specialist adjective

or specialistic

ˌspesh-ə-ˈlis-tik 

Medical Definition

specialist

noun

spe·​cial·​ist ˈspesh-(ə-)ləst 

: a medical practitioner whose practice is limited to a particular class of patients (as children) or of diseases (as skin diseases) or of technique (as surgery)

especially : a physician who is qualified by advanced training and certification by a specialty examining board to so limit his or her practice