If an object is beaming, it's glowing with light, but if a person is beaming, they're more likely to be smiling brightly.

Your car's beaming headlights or the beaming eyes of your cat, glowing in the dark, are bright and radiant. That's where the other meaning of beaming, cheerful and bright, comes from. A beaming smile glows and shines with true joy. Beaming comes from the verb beam, "emit rays of light."

Definitions of beaming
  1. adjective
    radiating or as if radiating light
    “the beaming sun”
    synonyms: beamy, effulgent, radiant, refulgent
    emitting or reflecting light readily or in large amounts
  2. adjective
    cheerful and bright
    “a beaming smile”
    synonyms: glad
    being full of or promoting cheer; having or showing good spirits
  3. adjective
    pleased and proud
    beaming parents”
    feeling self-respect or pleasure in something by which you measure your self-worth; or being a reason for pride
Word Family