Lockman, so called from the small quantity of meal (Scottice, lock) which he was entitled to take out of every boll exposed to market in the city. In Edinburgh, the duty has been very long commuted; but in Dumfries, the finisher of the law still exercises, or did lately exercise, his privilege, the quantity taken being regulated by a small iron ladle, which he uses as the measure of his perquisite. The expression lock, for a small quantity of any readily divisible dry substance, as corn, meal, flax, or the like, is still preserved, not only popularly, but in a legal description, as the lock and gowpen, or small quantity and handful, payable in thirlage cases, as in town multure.