Dictionary.com
Thesaurus.com

antipsychotic

American  
[an-tee-sahy-kot-ik, an-tahy-] / ˌæn ti saɪˈkɒt ɪk, ˌæn taɪ- /

adjective

  1. of or relating to any of various substances used in the treatment of psychosis, especially schizophrenia, and acute or severe states of mania, depression, or paranoia.

noun

  1. Also called neuroleptic.  Also called major tranquilizer.  any such substance, as the phenothiazines.

antipsychotic British  
/ ˌæntɪsaɪˈkɒtɪk /

adjective

  1. preventing or treating psychosis

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. any antipsychotic drug, such as chlorpromazine: used to treat such conditions as schizophrenia

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of antipsychotic

First recorded in 1950–55; anti- + psychotic

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.