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fire wall[′fīr ‚wȯl]
A fire-resisting wall separating two parts of a building from the lowest floor to several feet above the roof to prevent the spread of fire.
A fire-resisting wall surrounding an oil storage tank to retain oil that may escape and to confine fire.
1. An interior or exterior wall having sufficiently high fire resistance and structural stability under conditions of fire to restrict its spread to adjoining areas or adjacent buildings.
2. Any fire-resistant wall that separates one building from another or that subdivides a large building into smaller spaces; it is usually continuous from the foundations extending above the roof. See also: Wall
A wall so constructed as to prevent the spread of fire from one part of a building to another.