Frost (noun)

1. A covering of tiny ice crystals formed when the temperature of a surface falls below freezing point.
2. A temperature low enough to cause this to occur.
3. A harsh or cold quality.
4. A type of decoration made by spreading sugar on a surface, especially on a cake.
5. The weather condition characterized by the formation of frost.

Origin:

Old english forst, of west germanic origin; related to dutch vorst and german frost.

Examples:

1. The grass was covered in frost this morning.
2. The frost made the roads slippery and dangerous to drive on.
3. The air was crisp and had a frosty feel to it.
4. The baker added a delicate frosting to the cake.
5. The forecast called for clear skies with a chance of frost overnight.