1. having the most shiny, smooth, and lustrous surface
Usage: superlative form of glossy
2. most superficially attractive or sophisticated in appearance
Usage: often implies lack of substance

Examples

• Her hair looked the glossiest after using the new conditioner.
• The glossiest magazine covers always catch shoppers’ attention.
• This car has the glossiest paint job in the showroom.
• The glossiest apples are often the most expensive.
• He gave the glossiest presentation, but it lacked real content.
• The glossiest brochures don’t always represent the best products.