1. containing harmful bacteria, viruses, or other microorganisms that cause disease
2. affected by a computer virus or malicious software
Usage: computing
3. influenced by or filled with something undesirable that spreads
Usage: figurative

Examples

• The infected wound required immediate medical attention.
• She stayed home with an infected throat.
• The doctor cleaned the infected cut with antiseptic.
• His computer was infected with malware after downloading the file.
• The infected files were quarantined by the antivirus software.
• The whole office became infected with his negative attitude.
• The water supply was infected with harmful bacteria.