1. flat rectangular pieces of wood, glass, or other material that form part of a door, wall, or other surface
2. groups of people chosen to discuss something, make decisions, or answer questions
3. flat surfaces containing controls, instruments, or indicators

Examples

• The wooden panels on the door were beautifully carved.
• Solar panels covered the entire roof of the house.
• The expert panels will review all the applications.
• She checked the control panels before starting the machine.
• The wall panels were made of recycled materials.
• Three panels of judges evaluated the competition entries.
• The instrument panels displayed all the flight information.