1. objects or machines designed for a particular purpose
2. electronic equipment, especially computers, smartphones, or tablets
3. plans, schemes, or tricks used to achieve something

Examples

• The laboratory was filled with scientific devices for measuring temperature.
• Students must turn off all electronic devices during the exam.
• The new medical devices help doctors diagnose patients more accurately.
• She used various devices to convince her parents to let her go.
• Safety devices in cars have saved countless lives.
• The spy employed clever devices to gather information.
• Modern devices make communication much easier than before.