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drop siding[′dräp ‚sīd·iŋ]
Building siding with a shiplap joint.
drop siding, novelty siding, rustic siding
An exterior wall cladding of wooden boards (or strips of other material such as aluminum or vinyl), which are tongued and grooved or rabbeted and overlapped so that the lower edge of each board interlocks with a groove in the board immediately below it.