a person who devotes himself or herself to one subject or to one particular branch of a subject or pursuit.
a medical practitioner who devotes attention to a particular class of diseases, patients, etc.
U.S. Army. an enlisted person of one of four grades having technical or administrative duties, the grades corresponding to those of corporal through sergeant first class but not requiring the exercise of command.
Stock Exchange. a member of an exchange who executes orders in his or her name or for other stockbrokers in a single stock or a particular group of stocks and thus helps maintain the market in those securities on that exchange.

1855–60; special + -ist

nonspecialist, noun, adjective
prespecialist, noun
subspecialist, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To Specialist
World English Dictionary
specialist (ˈspɛʃəlɪst)
1.  a.  a person who specializes in or devotes himself to a particular area of activity, field of research, etc
 b.  (as modifier): specialist knowledge
2.  an enlisted rank in the US Army denoting technical qualifications that entitle the holder to a noncommissioned officer's pay
3.  ecology Compare generalist an organism that has special nutritional requirements and lives in a restricted habitat that provides these

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary

specialist spe·cial·ist (spěsh'ə-lĭst)
A physician whose practice is limited to a particular branch of medicine or surgery, especially one who is certified by a board of physicians.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Example sentences
When a specialist in any field publishes but cannot be read, others in the same field must rediscover his findings for themselves.
Perhaps because it was close to his beloved mathematics, the specialist field he chose was financial economics.
Contact an advertising specialist for more information.
His specialist subjects these days include global health, alternative energy
  technologies and evolutionary psychology.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature