Meaning of ANTI- in English

I. in pronunciations below, | ̷ ̷(ˌ) ̷ ̷ . |anˌtī or |an_tē or |antə̇ (-tə̇ occurring chiefly before consonants ) or |aan- or |ain- prefix

or ant- or anth-

Etymology: anti- from Middle English, from Old French & Latin; Old French, from Latin, against, from Greek, from anti; ant- from Middle English, from Latin, against, from Greek, from anti; anth- from Latin, against, from Greek, from anti — more at ante-


a. : one opposing the claims of : rival : spurious

anti christ

anti king

anti pope

b. : of the same kind but situated opposite, exerting energy in the opposite direction, or pursuing an opposite policy

ant apex

ant arctic

anti cline

anti school

anti volition

c. : one that is opposite in kind to

anti climax

anti hero

anti religion

— anti- before consonants other than h and sometimes ant- before vowels and anth- before h (which is not repeated), but more frequently anti- even before h or a vowel


a. : opposing or hostile to in opinion, sympathy, or practice

anti capitalist

anti democratic

anti romantic

anti slavery

anti union

b. : opposing in effect or activity : inhibiting : preventing : counteracting

ant acid

anth elmintic

anti aging

anti -Comintern

anti enzyme

anti fat

anti fogging

anti -inflationary

anti slip

anti trust

3. : not

anti grammatical

anti logical

4. : serving to prevent, cure, or alleviate (a pathological condition)

anti arthritic

anti spasmodic


a. : opposing or neutralizing another substance

anti body

anti serum

b. : substance that opposes or neutralizes (another substance) ; especially : substance that is an antibody to (a specified antigen)

anti toxin

6. : combating : destroying : defending against

anti aircraft

anti mine

anti tank

7. anti- : trans- 3 — especially in names of chemical structures in which the opposed atoms or groups are attached to carbon-to-nitrogen or nitrogen-to-nitrogen double bonds

sodium anti -benzene-diazoate

— opposed to syn- ; see benzaldoxime

II. prefix

Etymology: Middle French & Medieval Latin, from Latin ante-

: ante- — now little used because of possible confusion with 1 anti-

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.