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extensionist

American  
[ik-sten-shuh-nist] / ɪkˈstɛn ʃə nɪst /

noun

  1. a person or organization that supports the extension of something.

    A dedicated life extensionist, he believes that one day humanity will live forever through artificial intelligence.

  2. agricultural extensionist.

Etymology

Origin of extensionist

First recorded in 1860–65

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.