1 a : a group of people who answer questions, give advice or opinions about something, or take part in a discussion for an audience
The university is hosting a panel on free speech.
Tonight's show features a panel of famous chefs.
Three of the members on the panel are doctors.
a panel discussion on (the topic of) education
1 b : a group of people with special knowledge, skill, or experience who give advice or make decisions
The advisory panel has recommended that the drug be approved.
A panel of judges selected the book for this year's award.
1 c US : a group of people who are chosen to be jurors : JURY — called also jury panel
2 a : one of the flat pieces that make up a door, wall, or ceiling
The room was visible through the door's glass panel.
One of the ceiling panels needs to be replaced.
2 b : a piece of cloth that makes up part of something sewn together
Each of the skirt's five panels is a different color.
Sew the two panels together to form a tablecloth.
2 c : a piece of metal or plastic that forms part of the outside surface of a vehicle
Aside from a dent in one of the side panels the car is in good shape.
3 : a flat surface where the controls of a vehicle, machine, etc., are located
the control panel
The last number you called is listed on the phone's display panel.