covering

• IPA^(key): /ˈkʌvəɹɪŋ/

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Present participle or participial adjective from cover (verb) +‎ -ing; or, from Middle English participle form of coveren, keveren (“to cover”).

covering

1. present participle of cover

From Middle English coverynge, -inge, keverynge, -inge [verbal noun of coveren, keveren (“to cover”)][1]; or, verbal noun from cover (verb) +‎ -ing.

covering (countable and uncountable, plural coverings)

1. (countable) That which covers or conceals; a cover; something spread or laid over or wrapped about another.
   • 2020 May 20, Richard Clinnick, “Network News: More trains... but advice is not to use public transport”, in Rail, page 6:

     Face covering is also mentioned: "There are some circumstances when wearing a face covering may be marginally beneficial as a precautionary measure. The evidence suggests that wearing a face covering does not protect you, but it may protect others if you are infected but have not yet developed symptoms. [...] If you can, wear a face covering if you need to use public transport."

2. (uncountable) Action of the verb to cover.
3. (topology) A continuous map onto a topological space ${\displaystyle X}$, ${\displaystyle \pi :E\rightarrow X}$, such that there exists a discrete space ${\displaystyle D}$ and for every ${\displaystyle x\in X}$ an open neighborhood ${\displaystyle U\subset X}$, such that ${\displaystyle \pi ^{-1}(U)=\displaystyle \bigsqcup _{d\in D}V_{d}}$ and ${\displaystyle \pi |_{V_{d}}:V_{d}\rightarrow U}$ is a homeomorphism for every ${\displaystyle d\in D}$.