1. not protected from danger, attack, or unauthorized access
Usage: computing; technology
2. not firmly fixed or fastened

Examples

• The nonsecure network connection put our data at risk.
• Avoid sending passwords over nonsecure email.
• The nonsecure door latch made the building vulnerable to break-ins.
• They replaced the nonsecure wireless system with encrypted communication.
• The nonsecure attachment came loose during transport.
• Banking websites warn users about nonsecure connections.