introverts

Noun

introvert (plural introverts)

1. An organ or other body part that is or can be turned inside out, especially an anterior portion of some annelid worms capable of retraction.
   • Important distinctions which obtain amongst the various ‘introverts’ or intro- and e-versible tubes so frequently met with in animal bodies.1883, E. Ray Lankester, Encyclopaedia Britannica, Vol. XVI, p. 652, s.v. "Mollusca"
2. An introverted person: one who is considered more thoughtful than social, with a personality more inwardly than outwardly directed; one who often prefers to have time in non-social situations.
   • An Extravert can hardly conceive the necessity which compels the Introvert to conquer the world by means of a system.1916, Constance Ellen Long trans. Carl Jung as Collected Papers on Analytical Psychology, p. 349
3. (figuratively, proscribed) A reserved person.

See all 5 meanings of introvert