Meaning of “glow” - Learner’s Dictionary

glow

verb [ I ] uk us /ɡləʊ/
PRODUCE LIGHT

to produce a soft, warm light:

These toys glow in the dark.
LOOK HEALTHY

to have a warm and healthy appearance:

Her eyes were bright and her cheeks were glowing.
glow with happiness/pride, etc

to feel very happy/proud, etc:

Glowing with pride, she showed me her painting.

(Definition of “glow verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)