A loft or upper chamber forming the private accommodation of the head of the household in a medieval hall; a garret room.
"After the great fire, the family moved their winter quarters from the main hall down to the solar above the kitchen."
"The solar on our roof provides enough energy to power all our lights."
relating to or derived from the sun or utilizing the energies of the sun
"solar eclipse"
"solar energy"
Of or pertaining to the sun; proceeding from the sun
"The solar eclipse was visible across much of North America yesterday."
Pertaining to the Sun (the star Sol).
In plain English: Solar means something that comes from the sun, like solar power or solar energy.
"The solar panel on the roof collects energy from the sun."
Usage: Use solar specifically when referring directly to energy, power, or phenomena originating from the Sun itself, such as solar panels. Avoid using it interchangeably with words like "sunlight" if you need a noun rather than an adjective describing something powered by sunlight.
The word solar comes from the Latin term for "of or pertaining to the sun." It entered English during the Late Middle English period with this same meaning.