functionalist

or Functionalist

[ fuhngk-shuh-nl-ist ]
/ ˈfʌŋk ʃə nl ɪst /

noun

a person who advocates, or works according to, the principles of functionalism.

adjective

of or relating to functionalism.
built or made according to the principles of Functionalism by a person associated with the movement.

Origin of functionalist

First recorded in 1910–15; functional + -ist