Real Dictionary

glow
A glow is a dull, steady light, for example the light produced by a fire when there are no flames.
singular noun: A glow is a pink colour on a person's face, usually because they are healthy or have been exercising.
singular noun: If you feel a glow of satisfaction or achievement, you have a strong feeling of pleasure because of something that you have done or that has happened.

glow in American English
to give off a bright light as a result of great heat; be incandescent or red-hot
intransitive verb: to emit bright light and heat without flame; become incandescent
noun: a light emitted by or as if by a substance heated to luminosity; incandescence

glow in British English
to emit a steady even light without flames
noun: light emitted by a substance or object at a high temperature