The term database security refers to the set of measures and controls that are put in place to protect databases from unauthorized access, use, disclosure, disruption, modification, or destruction. It involves implementing a variety of measures and controls to ensure that databases are secure, both when they are stored and when they are accessed. 

Database security may include activities such as: 

• Implementing access controls: Access controls limit who can access the database, based on factors such as the user's identity, role, and location. 
• Encrypting data: Encrypting data makes it unreadable to anyone who does not have the appropriate decryption key. 
• Conducting security assessments: Security assessments can identify vulnerabilities in databases and the systems and networks that support them that may be exploited to gain unauthorized access. 
• Developing database security policies: Database security policies outline the rules and procedures that must be followed to ensure the security of the database. 

The importance of database security is an important aspect of overall cybersecurity, and it can help organizations to protect sensitive and confidential information, meet regulatory compliance requirements, and reduce the risk of data breaches and other security incidents.