What does deice mean?
To deice is to remove ice or frost that has built up on a surface, most famously the wings and fuselage of an aircraft before flight. Ice accumulation disrupts airflow over a wing and can add dangerous weight, so airlines treat deicing as a critical safety procedure rather than a routine chore. Ground crews typically spray aircraft with heated glycol-based fluid, though heated air and mechanical scraping are also used; the same verb applies to deicing car windshields, roads, and other exposed surfaces. The word formed transparently from the prefix 'de-' (meaning removal) plus 'ice', and it emerged in twentieth-century English alongside the growth of winter aviation. Closely related forms include 'deicer' (the agent or the fluid itself) and 'deicing' (the noun naming the procedure). Because the word belongs largely to technical and operational language, it carries a practical, professional register, appearing most often in weather reports, airline announcements, and maintenance documentation rather than everyday conversation.
verbTo remove ice or frost from a surface, especially an aircraft's wings or a vehicle's windscreen, typically using chemicals or heat.
- To remove ice or frost from a surface, especially aircraft wings, using chemical fluids, heated air, or mechanical methods.
"Ground crews deiced the plane for over an hour before it was cleared for takeoff."
"The pilot taxied back to the gate so the crew could deice the wings before departure."
"In hard winters, airports can spend millions of dollars each season on fluid to deice their fleets."
Before 1940, 'deice' barely existed as a word — commercial aviation invented the need for it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of deice
Deice is a straightforward twentieth-century English formation, combining the Latin-derived prefix 'de-', indicating removal or reversal, with the native English noun 'ice'. The word arose with the development of commercial aviation, when removing ice from aircraft surfaces became a routine operational necessity. Its derivatives — deicer and deicing — followed naturally, with deicing becoming the standard term for the industrial process of treating aircraft with anti-icing and deicing fluids.
Related word forms
How deice is actually used
Primarily used in aviation and transportation contexts; often appears in passive or participial form (e.g., 'the aircraft was deiced'). The noun form is usually written 'de-icer' or 'deicer', and the process is commonly called 'deicing'.
Easily confused with deice
Defrost generally means removing frost or frozen buildup, especially in appliances or vehicles, while deice more specifically refers to removing accumulated ice, particularly from aircraft.