obsessionistn.
/əbˈsɛʃənɪst/, /əbˈsɛʃn̩ɪst/, U.S. /əbˈsɛʃ(ə)nəst/, /ɑbˈsɛʃ(ə)nəst/ A person who is subject to an obsession, an obsessive.
ΘΚΠ
the mind > mental capacity > psychology > theory of psychoanalysis > libido > obsession > [noun] > quality of being obsessive > person having
obsessionist1921
obsessional1928
obsessive1959
1921 Glasgow Herald 24 June 8/4 The canards of the anti-waste obsessionists.
1928 Daily Express 6 Dec. 10/5 I once sat in a train for five hours opposite an obsessionist, who played chess with himself on a miniature board.
1986 Daily Tel. 11 June 16/4 Bigoted racial obsessionists (many of them white) who hound schoolmasters, dons, and lecturers for daring to think out loud about their misgivings.
This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).
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n.1921