What is Glow?

Glow definition and meaning on Dictionary terms:
a light emitted by or as if by a substance heated to luminosity; incandescence.
brightness of color.
a sensation or state of bodily heat.

a warm, ruddy color of the cheeks.
warmth of emotion or passion; ardor.

verb (used without object)
to emit bright light and heat without flame; become incandescent.
to shine like something intensely heated.
to exhibit a strong, bright color; be lustrously red or brilliant.

(of the cheeks) to exhibit a healthy, warm, ruddy color.
to become or feel very warm or hot.
to show emotion or elation: to glow with pride.