anti
1 of 4noun
an·ti ˈan-ˌtī 
ˈan-tē
ˈan-tē plural antis
: one that is opposed
The group was divided into pros and antis.
anti
2 of 4adjective
: opposed
the anti group
anti
3 of 4preposition
: opposed to : against
They were anti big corporations.
anti-
4 of 4prefix
ˌan-ˌtī,
ˌan-tē,
also before consonsants ˌan-ti
variants or ant- or anth-
1
a
: of the same kind but situated opposite, exerting energy in the opposite direction, or pursuing an opposite policy
anticlinal
b
: one that is opposite in kind to
anticlimax
2
a
: opposing or hostile to in opinion, sympathy, or practice
anti-Semite
b
: opposing in effect or activity
antacid
3
: serving to prevent, cure, or alleviate
antianxiety
4
: combating or defending against
antiaircraft
antimissile
5
: being or composed of antimatter
antiproton
antihydrogen
Synonyms
Preposition
- against
- agin [dialect]
- contra
See all Synonyms & Antonyms 
Example Sentences
Preposition if you ask me, she's anti anything that sounds like the least bit of fun
Word History
Etymology
Noun
anti-
Adjective
see anti-
Preposition
see anti-
Prefix
anti- from Middle English, from Anglo-French & Latin; Anglo-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-
First Known Use
Noun
1788, in the meaning defined above
Adjective
1855, in the meaning defined above
Preposition
1817, in the meaning defined above
Kids Definition
anti-
prefix
ˈan-ti,
ˈan-ˌtī
variants or ant-
ant
1
: opposite in kind, position, or action
anticyclone
2
: hostile toward
antisocial
anti
preposition
as in against
opposed to; not for if you ask me, she's anti anything that sounds like the least bit of fun Synonyms & Similar Words
Relevance
- against
- contra
- agin
- versus
- with
- contrary to
- athwart
Antonyms & Near Antonyms
- for
- pro