also: イリュミネーション · イルミネイション · イリュミネイション
illumination; decorative lighting
Refers to decorative lighting displays, especially seasonal events like Christmas illuminations or city light-ups.
In winter, the whole town is decorated with illuminations.
This year's Christmas illuminations were very beautiful.
During the Christmas season, many people go to see the illuminations at the park.
The illuminations in front of the station will be lit up tonight.
They decorated the whole shopping street with illuminations.