Blockhouse

(Mil.) A work of defence, formed principally, as the name implies, of logs of timber. It may be built by itself, in which case it may be looked on as a small independent fort; or it may be situated in the interior of field-works, when it becomes a retrenchment, used for the same purposes as erections of a somewhat similar nature, called blindages. Block house, in Pennsylvania, a village of Liberty township, Tioga co., 30 m. N. of William sport. Block'ing-course, n. ( Arch. ) A course of masonry or brick-work, laid on the top a cornice crowning a wall.