1. having the most sheen; most lustrous or glossy
Usage: superlative form of ‘sheeny’

Examples

• Her hair looked the sheeniest after using the new conditioner.
• Among all the fabrics, the silk was the sheeniest.
• The sheeniest apples were displayed at the front of the stand.
• His car’s paint job was the sheeniest on the lot.
• The sheeniest pearls were reserved for the most expensive necklace.