1. 照明;照亮
Illumination is the lighting that a place has.
illumination在线翻译
e.g. The only illumination came from a small window high in the opposite wall.
唯一的亮光来自对面墙上高处的一扇小窗子。
2. 彩灯;灯饰
Illuminations are coloured lights which are put up in towns, especially at Christmas, in order to make them look attractive, especially at night.
e.g. ...the famous Blackpool illuminations.
著名的布莱克浦彩灯节
3. 觉悟;启发;精神启示
You can use illumination to describe an increased understanding of something, especially something of a religious or spiritual nature.
e.g. ...a sense of illumination...
顿悟
e.g. No further illumination can be had from this theory.
这一理论不能给人以更深刻的启迪。