antivirus
n. B1 Intermediate US //ˌæntiˈvaɪɹəs// UK //ˌæntɪvˈaɪɹəs// an·tivirus
n. a program or tool that helps protect your computer from viruses and other types of harmful software. You usually install it to keep your files safe.
n. a software application designed to detect, prevent, and remove malicious software from a computer system. Often used as a shortened form of 'antivirus program'.
I need to install an antivirus to protect my laptop.
The company provides a free antivirus to all employees to ensure their work computers remain secure from malware.
Modern antivirus solutions often utilize heuristic analysis to identify previously unknown threats by examining the behavior of suspicious files rather than relying solely on a database of known signatures.
From anti- + virus.