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  2. Cover - Wikipedia

    en.wikipedia.org/wiki/Cover

    Cover, a pair in the covering relation of a partially ordered set, or the greater element in such a pair Cover, in database theory, an equivalent set of constraints Land cover , physical material on the surface of the earth

  3. Cover (topology) - Wikipedia

    en.wikipedia.org/wiki/Cover_(topology)

    Covers are commonly used in the context of topology.If the set is a topological space, then a cover of is a collection of subsets {} of whose union is the whole space .In this case is said to cover , or that the sets cover .

  4. Cover version - Wikipedia

    en.wikipedia.org/wiki/Cover_version

    Jimi Hendrix's cover of "All Along the Watchtower" was more successful than Bob Dylan's original version. In popular music, a cover version, cover song, remake, revival, or simply cover is a new performance or recording by a musician other than the original performer or composer of the song. Originally, it referred to a version of a song ...

  5. Cover (intelligence gathering) - Wikipedia

    en.wikipedia.org/wiki/Cover_(intelligence_gathering)

    A cover in foreign, military or police human intelligence or counterintelligence is the ostensible identity and/or role or position in an infiltrated organization assumed by a covert agent during a covert operation.

  6. Land cover - Wikipedia

    en.wikipedia.org/wiki/Land_cover

    Land cover is the physical material at the land surface of Earth. Land covers include flora , concrete , built structures, bare ground, and temporary water . Earth cover is the expression used by ecologist Frederick Edward Clements that has its closest modern equivalent being vegetation .

  7. Covering space - Wikipedia

    en.wikipedia.org/wiki/Covering_space

    Intuitively, a covering locally projects a "stack of pancakes" above an open neighborhood onto . In topology, a covering or covering projection is a map between topological spaces that, intuitively, locally acts like a projection of multiple copies of a space onto itself.

  8. Book cover - Wikipedia

    en.wikipedia.org/wiki/Book_cover

    Front cover contents may usually be: For novels, the novel title in large letters, author name, tagline and symbol of publisher (in corner) Back cover (also called 'lower cover') contents may usually be: For novels, a back cover text or teaser that gives a hint of the story in an attractive way. A picture of the writer. A summary

  9. Concrete cover - Wikipedia

    en.wikipedia.org/wiki/Concrete_cover

    Concrete cover, in reinforced concrete, is the least distance between the surface of embedded reinforcement and the outer surface of the concrete (ACI 130). The concrete cover depth can be measured with a cover meter. The purpose of concrete cover is to protect the reinforcement from corrosion, fire, and other potential damage.