"Hypersonic" refers to speeds that exceed five times the speed of sound, or Mach 5. This means traveling at over 3,800 miles per hour (6,100 kilometers per hour). Hypersonic technology is significant for various applications, including military defense systems and space exploration, as it allows for rapid travel and improved maneuverability. Hypersonic vehicles can glide or fly at these extreme speeds, often using advanced propulsion systems like scramjets. Countries like the United States, China, and Russia are actively researching and developing hypersonic capabilities, aiming to enhance their strategic advantages in defense and aerospace sectors.