- noun the deposit of ice that forms on surfaces when the temperature is below the freezing point of water
- noun freezing weather when the temperature is below the freezing point of water. Frost may lead to a deposit of crystals of ice on surfaces.
- Thin frost has been observed by Viking spacecraft on the surface of Mars, and ambiguous observations from lunar orbit by Clementine suggest that it might also be found in sheltered areas near the Moon’s poles
- noun a deposit of very small ice crystals formed when water vapour condenses at a temperature below freezing
- verb to give an item, especially a soft fruit or the rim of a glass or coupe, a frosty appearance by dipping it in lightly whipped egg white then in caster sugar and leaving it to dry
- noun freezing conditions, which cover the ground and other surfaces with ice
- noun a failure, a woeful example of inadequacy. This fairly rare usage of the word occurs in educated speech, particularly in reference to a disappointing performance (e.g. in the theatre; it may originate in a literary or Shakespearean ‘killing frost’).
- noun a snub or silent rebuff. This sense of the word derives from the verb form, currently in vogue among adolescents, particularly in the USA.