A block that encloses and aids a journal or shaft; a bearing.
a metal block for promoting a rotating shaft; a bearing
a block, or standard, for supporting a journal, as of a shaft. Most commonly it is bolted into the frame or first step toward a machine, and it is frequently furnished with journal bins, and a movable address, or cap, for tightening the bearings in the form of bolts; -- labeled as additionally pillar block, or plumber block.
a cast-iron or metal block for promoting a journal or bearing