Looking up...
The bride looked radiant in her white dress.
The bride's appearance was bright and glowing, making her look beautiful.
emitting or reflecting light; shining brightly
The sun was radiant in the clear sky.
The sun was shining brightly in the clear sky.
Often used to describe light or objects that emit a bright glow.
showing great happiness or beauty; glowing
Her face was radiant with joy.
Her face was glowing with happiness.
Used metaphorically to describe people or things that appear bright and beautiful.
Radiant is often used metaphorically to describe people or things that appear bright and beautiful, not just objects that emit light.
From Latin 'radiant-', present participle of 'radiāre' meaning 'to shine'.
Can be used both literally (to describe light) and metaphorically (to describe people or things that appear beautiful or happy).