1. against; opposed to; preventing

1. a person who is opposed to something
Usage: informal

1. opposed to or against something
Usage: informal

Examples

• The antiwar protesters gathered in the square.
• She took an antibiotic to fight the infection.
• He’s very anti when it comes to new technology.
• The antis outnumbered the supporters at the meeting.
• They formed an anti-smoking campaign.
• Her anti attitude made negotiations difficult.
• The antiviral medication helped reduce symptoms.