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present participle and gerund of cover examples
countable and uncountable, plural coverings
(countable) That which covers or conceals; a cover; something spread or laid over or wrapped about another. quotations examples
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."
2020 May 20, Richard Clinnick, “Network News: More trains... but advice is not to use public transport”, in Rail, page 6
(uncountable) Action of the verb to cover. examples
(topology) A continuous map onto a topological space X , π : E → X , such that there exists a discrete space D and for every x ∈ X an open neighborhood U ⊂ X , such that π − 1 ( U ) = ⨆ d ∈ D V d and π | V d : V d → U is a homeomorphism for every d ∈ D .