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a. One that performs a specified action: lobbyist.
b. One that produces, makes, operates, plays, or is connected with a specified thing: novelist.
2. A specialist in a specified art, science, or skill: biologist.
3. An adherent or advocate of a specified doctrine, theory, or school of thought: anarchist.
4. One that is characterized by a specified trait or quality: romanticist.
[Middle English -iste, from Old French, from Latin -istēs, -ista, from Greek -istēs, agent n. suff.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (forming nouns) a person who performs a certain action or is concerned with something specified: motorist; soloist.
2. (forming nouns) a person who practises in a specific field: physicist; typist.
3. (forming nouns and adjectives) a person who advocates a particular doctrine, system, etc, or relating to such a person or the doctrine advocated: socialist.
4. (forming nouns and adjectives) a person characterized by a specified trait, tendency, etc, or relating to such a person or trait: purist.
5. (forming nouns and adjectives) a person who is prejudiced on the basis specified: sexist; ageist.
[via Old French from Latin -ista, -istēs, from Greek -istēs]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a suffix of nouns, often corresponding to verbs ending in -ize or nouns ending in -ism, that denote a person who practices, is expert in, or is concerned with something, or holds certain principles, doctrines, etc.: apologist; machinist; novelist; socialist; Thomist. Compare -ism, -istic, -ize.
[Middle English -iste < Latin -ista < Greek -istēs; in some words, representing French -iste, German -ist, Italian -ista, etc., « Latin < Greek]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.