ground frost: meaning, definition, pronunciation and examples
B2Technical/Weather forecasting, Gardening, General informative
Quick answer
What does “ground frost” mean?
A deposit of ice crystals forming on surfaces (e.
Audio
Pronunciation
Definition
Meaning and Definition
A deposit of ice crystals forming on surfaces (e.g., grass, car roofs) when the ground temperature falls below freezing point, typically occurring on clear, calm nights.
Used in meteorological contexts to specifically indicate freezing conditions at the Earth's surface, as opposed to air frost measured in a standard screen. In gardening and agriculture, it signals potential damage to tender plants.
Dialectal Variation
British vs American Usage
Differences
The term is common in UK weather reports (Met Office). In the US, 'frost' is more commonly used generically, though 'ground frost' is understood in technical/meteorological circles.
Connotations
UK: A standard, neutral term in weather forecasting. US: Slightly more technical or specific, less common in everyday forecasts.
Frequency
High frequency in UK weather reporting; medium-low frequency in general US English, except in specific domains like horticulture or aviation.
Grammar
How to Use “ground frost” in a Sentence
VERB + ground frost: expect, forecast, report, see, get, experienceADJECTIVE + ground frost: widespread, sharp, patchy, severe, lightVocabulary
Collocations
Examples
Examples of “ground frost” in a Sentence
verb
British English
- The Met Office is warning that it will ground frost tonight across the Midlands.
- It ground frosted earlier than expected, catching the gardeners off guard.
American English
- The valley tends to ground frost before the surrounding hills.
- It's supposed to ground frost, so bring your potted plants inside.
adjective
British English
- We had a ground-frost night in early September.
- The ground-frost conditions made the grass crunch underfoot.
American English
- The ground-frost warning was issued for coastal areas.
- They recorded a ground-frost temperature of -2°C at the sensor.
Usage
Meaning in Context
Business
Impacts logistics (e.g., 'Ground frost delayed morning deliveries.')
Academic
Discussed in climatology, environmental science, and agriculture papers.
Everyday
Used in planning (e.g., covering plants, scraping car windscreens).
Technical
Precise meteorological observation, distinct from 'air frost'.
Watch out
Common Mistakes When Using “ground frost”
- Using 'ground frost' to mean frozen soil (permafrost).
- Confusing 'ground frost' with 'black frost' (a freeze without visible ice crystals).
- Saying 'floor frost' instead of 'ground frost'.
FAQ
Frequently Asked Questions
Ground frost means the temperature at ground level (on grass, cars) has fallen below 0°C, causing ice to form on surfaces. Air frost is when the air temperature, measured in a standard shelter 1.2-2m above ground, falls below 0°C. You can have one without the other.
No. Ground frost (or white frost) is visibly white ice crystals. Black frost is a freeze without visible ice crystals; the moisture in the air is too low to form crystals, but plants still freeze and turn black.
On clear, calm nights, especially in autumn and spring, when the Earth's surface radiates heat away quickly into space (radiation cooling). Clouds or wind usually prevent it.
Yes, tender plants, seedlings, and early blossoms can be damaged or killed by ground frost. Protection includes covering them with fleece, cloches, or bringing pots indoors.
A deposit of ice crystals forming on surfaces (e.
Ground frost is usually technical/weather forecasting, gardening, general informative in register.
Ground frost: in British English it is pronounced /ɡraʊnd frɒst/, and in American English it is pronounced /ɡraʊnd frɔːst/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Frost on the pumpkin (US, similar seasonal indicator)”
- “A frosty morning”
Learning
Memory Aids
Mnemonic
GROUND FROST: Picture FROST on the GROUND, not in the air. It's down low, like a white carpet.
Conceptual Metaphor
WINTER'S PAINTBRUSH (the frost paints the ground white)
Practice
Quiz
In a detailed weather report, 'ground frost' specifically indicates: