1 prefix Anti- is used to form adjectives and nouns that describe someone or something that is opposed to a particular system, practice, or group of people.
...anti-government demonstrations., ...anti-racist campaigners., ...anti-Fascists.
2 prefix Anti- is used to form adjectives and nouns that describe things that are intended to destroy something harmful or to prevent something from happening.
...anti-aircraft guns., ...anti-discrimination legislation., ...anti-inflammatory drugs.