Also doo'cot. Scottish (and North English) word for dovecote.
A pigeon house or culverhouse, a resting place for pigeons or doves. These can range in size from small and decorative (like back garden bird-cages), to enormous stone structures larger than a house (e.g. the Boath doocot in Nairn, which can house thousands of birds).
There are two main types: the beehive, which is a circular construction with a conical roof, and the lectern or lean-to type, rectangular with a pitched roof.
The birds were kept for their meat, of course, though this usage died out in the 1900s with industrialization and the availability of cheap alternative meat sources.