Definition of anti- in English:

anti-

Syllabification: anti-
(also ant-)

prefix

1Opposed to; against: antiaircraft
1.4 Physics The opposite state of matter or of a specified particle: antimatter antiproton
1.5Acting as a rival: antipope
1.6Unlike the conventional form: antihero

Origin

representing Greek anti 'against'.

Definition of anti- in:

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Word of the day oleaginous
Pronunciation: ˌōlēˈajənəs
adjective
rich in, covered with, or producing oil; oily