covering
/ˈkʌvəɹɪŋ/ noun B1- That which covers or conceals; a cover; something spread or laid over or wrapped about another.
- Action of the verb to cover.
- A collection of sets U_i such that their union contains U; such a collection with the additional property that every U_i is open; such a collection with the additional property that every U_i is contained in U.
- A special kind of map that establishes a relationship between two topological spaces in the sense that, under the action of the map, the one looks locally like several copies of the second: Formally, a continuous map π:E→X between topological spaces such that there exists, for every point x in X, a discrete space D_x and an open neighborhood U of x such that π⁻¹(U)= displaystyle ⨆_(d∈D_x)V_d and π|_(V_d):V_d→U is a homeomorphism for every d∈D_x. See Covering space on Wikipedia.Wikipedia
Plural coverings
From the library
The tree made a good, thick covering to protect them from the dew, and the Tin Woodman chopped a great pile of wood with his axe and Dorothy built a splendid fire that warmed her and made her feel less lonely.
Upon which a Currier stood up and said, “Sirs, I differ from you altogether: there is no material for resistance equal to a covering of hides; and nothing so good as leather.”
And yet those strange, peaked roofs and quaint, overhung gables were a fitting covering to grim and terrible intrigue.
“My darling child!” she cried, folding the little girl in her arms and covering her face with kisses.
Learn covering in real texts
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