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/sɛkʊrɪti ˈsɒftwɛr/ · secur-i-ty soft-ware
noun
  1. Computer programs designed to protect digital information and systems from unauthorized access, damage, or theft. The company uses security software to protect its customer data from cyber attacks.
  2. A type of software that provides a secure environment for users to access and manage sensitive information. The bank's online banking system uses security software to authenticate user identities and protect financial transactions.
Did you know? The first security software was developed in the 1960s by the United States Department of Defense to protect its computer systems from unauthorized access.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Jul 21, 2026