1. A pair of large baskets or panniers slung across the back of a pack animal, such as a horse or mule, for carrying cargo.
Usage: Usually used in plural form.; Regional or specialized term, particularly in ranching and pack-animal contexts.

Examples

• The pack mule carried supplies in kiacks on either side of its back.
• Cowboys loaded the kiacks with provisions for the mountain expedition.
• The trader secured the kiacks firmly before setting out on the trail.
• Each kiack held about fifty pounds of goods.
• The old prospector used kiacks to transport ore samples from the mine.