What does defogging mean?
Defogging literally denotes removing fog, mist, or condensation from a surface, most familiarly a windscreen or aircraft window. In automotive contexts, it can name both the procedure and the system or agent used to carry it out. The word also has a figurative sense: clarifying an obscure explanation, uncertain situation, or complicated issue. In that use, defogging often suggests restoring visibility without necessarily providing a detailed analysis. Grammatically, defogging can be a noun for the process, as in a delay caused by the defogging of the windows, or a gerund or present participle of the verb defog, as in a device designed for defogging the glass. It is used in British and American English, with the literal sense especially associated with transport and weather conditions. Figuratively, the term conveys the idea of making something difficult suddenly easier to perceive.
The process of removing fog, mist, or condensation from a surface, especially a windscreen or window.
"The defogging of the windscreen took only a few seconds."
Usually uncountable; the plural defoggings is rare.
To remove fog, mist, or condensation from a surface; figuratively, to make an obscure matter easier to understand.
"Technicians are defogging the windscreen before testing the camera."
The literal use is chiefly automotive or technical, while figurative use is common in general and business prose.
Rare count plural; defogging is normally used as an uncountable noun.
"Repeated defoggings were required as the humidity rose."
Defogging can mean clearing a windscreen—or, figuratively, making a complicated situation suddenly easier to understand.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of defogging
Defogging is an English formation combining the prefix de-, meaning removal or reversal, with fog and the gerund ending -ing; it is closely related to the verb defog. The prefix comes ultimately from Latin, whereas fog is an English word attested from Middle English, although the ultimate origin of the base noun is uncertain. The same English root also appears in related words such as foggy, fogless, and fogbound.
Related word forms
How defogging is actually used
The literal sense is common in automotive, transport, and technical contexts, while the figurative sense is established in general, journalistic, and business prose. The noun is normally uncountable, and the verb is somewhat less frequent than the related verb defog.
Easily confused with defogging
Fogging means becoming or causing something to become covered with fog or condensation, whereas defogging means removing that obscuring layer.