anti

[ an-tahy, an-tee ]
See synonyms for: antiantis on Thesaurus.com

noun,plural an·tis.
  1. a person who is opposed to a particular practice, party, policy, action, etc.

Origin of anti

1
First recorded in 1780–90; by shortening of words prefixed with anti-

Words that may be confused with anti

Words Nearby anti

Other definitions for anti- (2 of 2)

anti-

  1. a prefix meaning “against,” “opposite of,” “antiparticle of,” used in the formation of compound words (anticline); used freely in combination with elements of any origin (antibody; antifreeze; antiknock; antilepton).

Origin of anti-

2
From Middle English, from Latin, from Greek, prefixal use of antí; akin to Sanskrit ánti “opposite,” Latin ante, Middle Dutch ende (giving rise to Dutch en “and”), English an- in answer. See ante-, and
  • Also before a vowel, ant-.

usage note For anti-

Words that may be confused with anti-

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use anti in a sentence

British Dictionary definitions for anti (1 of 2)

anti

/ (ˈæntɪ) informal /


adjective
  1. opposed to a party, policy, attitude, etc: he won't join because he is rather anti

noun
  1. an opponent of a party, policy, etc

British Dictionary definitions for anti- (2 of 2)

anti-

prefix
  1. against; opposing: anticlerical; antisocial

  2. opposite to: anticlimax; antimere

  1. rival; false: antipope

  2. counteracting, inhibiting, or neutralizing: antifreeze; antihistamine

  3. designating the antiparticle of the particle specified: antineutron

Origin of anti-

2
from Greek anti

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

Scientific definitions for anti-

anti-

  1. A prefix whose basic meaning is “against.” It is used to form adjectives that mean “counteracting” (such as antiseptic, preventing infection). It is also used to form nouns referring to substances that counteract other substances (such as antihistamine, a substance counteracting histamine), and nouns meaning “something that displays opposite, reverse, or inverse characteristics of something else” (such as anticyclone, a storm that circulates in the opposite direction from a cyclone). Before a vowel it becomes ant-, as in antacid.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.