This expression suggests a lack of interest or emotion, not just physical tiredness.

Emotional Indication

'Glass over' is a metaphor; no actual glass is involved.

Not Literal

The phrase often implies a temporary condition.

Refers to an immediate change in weather, suggesting rain or overcast conditions.

Describes the texture or appearance of the sky, similar to a sheet of glass.

Can indicate a quick shift in weather, rather than a gradual change.

The action is used to safeguard the surface beneath, often making it shiny.

It's a step in crafting that might require skill or special materials.

The quality of glassing over can affect the item's durability and look.