a district of the shire of Inverness in Scotland. It is bounded by Moydart on the west, Glengarry on the north, Badenoch on the east, and Lorn on the south. It derives its name from the lake or Loch Aber; and extends about 20 miles from east to west, and 30 from north to south. The country is barren, bleak, mountainous, and rugged. Near the mouth of the river Aber, in the centre between the West and North Highlands, stands Fort William, with the town of Maryburgh, built upon a navigable arm of the sea, not far from the foot of Ben Nevis. The town, designed as a futillery for the garrison, was erected into a borough; and the fort itself was designed as a check upon some of the clans, who had been guilty of depredations and other irregularities. Lochaber is inhabited mostly by the Macdonalds, Camerons, and Mackintoshes. The castle of Macdonald of Glengarry, in this district, was burnt to the ground in the year 1715, in consequence of his declaring for the Pretender. The elegant house and gardens belonging to Cameron of Lochiel underwent the same fate, for the same reason, in the year 1746.