The defense sector refers to the part of the economy that focuses on the production and supply of military equipment, technology, and services. This includes everything from weapons systems and vehicles to cybersecurity solutions. Companies in this sector often work closely with government agencies to meet national security needs. Additionally, the defense sector encompasses research and development efforts aimed at improving military capabilities. This can involve innovations in areas like artificial intelligence, drones, and missile defense systems. Overall, the defense sector plays a crucial role in maintaining a country's security and readiness.