a.

1. 光芒四射的；明亮照耀的[B]
   the radiant sun

   光芒四射的太陽

2. 容光煥發的；（面容，目光）洋溢著幸福的[（+with）]
   His radiant face told us of his happiness.

   從他容光煥發的臉上，我們看出他很幸福快樂。

3. 【物】發光的；發熱的；輻射的[B]
   The sun is a radiant body.

   太陽是發光體。

n.

1. 發光（或發熱）的物體，光點
2. （電爐等的）白熾部分
3. 【天】（流星雨）輻射點

adj.

1. shining or glowing brightly.
   ▸displaying great joy, love, or health.
   ▸(of an emotion or quality) very conspicuous.
2. transmitted by electromagnetic radiation, rather than conduction or convection.
   ▸(of an appliance) emitting radiant energy for cooking or heating.

n.

1. a point or object from which light or heat radiates.
2. Astronomy  the apparent focal point of a meteor shower.