Marked so as to be recognised. The allusion is to marking cattle and sheep on the ear, by which they may be readily recognised.
“The increase [of these wild cattle] were duly branded and ear-marked each year.”—Nineteenth Century (May, 1893), p. 789.
“The late president [Balmaceda] took on board a large quantity of silver, which had been earmarked for a particular purpose.”—Newspaper paragraph, Sept. 4, 1891.