(līt′n) v.t.
1. To make light or more light.
2. To enlighten, as the mind.
3. Rare To send forth like lightning.
—v.i.
4. To become light or more light.
5. To flash or shine.
6. To flash lightning.

(līt′n) v.t.
1. To make less heavy.
2. To reduce the load of: to lighten ship.
3. To make less burdensome or oppressive.
4. To relieve from distress; gladden.
—v.i.
5. To become less heavy. See synonyms under ALLAY, ALLEVIATE.