relating to an empire

Britain's imperial past

relating to or denoting the system of non-metric weights and measures (the ounce, pound, stone, inch, foot, yard, mile, acre, pint, gallon, etc.) formerly used for all measures in the UK, and still used for some

(of a size of paper, in the UK) measuring 762 × 559 mm (30 × 22 inches)

a small pointed beard growing below the lower lip (associated with Napoleon III of France)