a flat or curved component, typically rectangular, that forms or is set into the surface of a door, wall, or ceiling

a layer of insulating material should be placed between the panels and the wall

a flat board on which instruments or controls are fixed

a control panel

a small group of people brought together to investigate or decide on a particular matter

an interview panel

a person or people charged with an offence

cover (a wall or other surface) with panels

we panelled the wall around the window

A prostitute; a loose woman; (also) †a priest's mistress (obsolete). Also in extended use: a weak or effeminate man. In later use archaic or regional.