What does deice mean?
Deice is a transitive verb meaning to remove ice or frost from a surface. It is especially common in transport contexts: crews deice aircraft, roads, runways, and windscreens, often by spreading heated or chemical de-icing fluid. The verb can also be used more generally for clearing frozen deposits from machinery or other exposed surfaces. Both deice and de-ice are standard spellings, with hyphenation varying by dictionary, house style, and context. The word is practical and precise: it describes treating an icy surface, rather than merely thawing a frozen substance. Its familiar aviation sense carries no strong emotional connotation, though technical usage is common in cold-weather operations. Understanding deice is useful because a surface that appears clear may still require treatment, particularly before aircraft take off or vehicles travel on roads in freezing conditions.
verbTo remove ice or frost from a surface, typically by applying heated or chemical de-icing fluid or using another treatment.
- To remove ice or frost from a surface, especially an aircraft, road, runway, windscreen, or piece of machinery.
"Crews deice the runway before the first flights of the day."
"Ground crews deice the aircraft before it departs."
"Drivers use heated screens to deice the windscreen in freezing weather."
A runway can look perfectly clear and still be dangerous: deicing removes existing ice, while anti-icing aims to prevent ice from forming.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does deice come from?
Deice was formed in 19th-century English from the established combining form de-, meaning “remove” or “undo,” and ice, which comes from Old English īs, inherited from Germanic. Related English words such as icicle and iceberg preserve the same ice root, while icy belongs to the same Germanic word family.
Related word forms
How deice is actually used
The verb is usually transitive, taking the object being treated. Both deice and de-ice are standard spellings, with hyphenation varying by dictionary, house style, and context.
Easily confused with deice
Deice is the verb meaning to remove ice, whereas a deicer is a device or substance used for that purpose.