noun A text-only logo consisting of the initials of a brand name or business.
noun The designation of funds from the federal budget for a particular project created in response to a letter from a member of congress to an official in the executive branch who is responsible for authorizing appropriations.
verb To obtain a lettermark on funds from the federal budget by sending a letter (from a member of Congress) to the appropriate official in the executive branch who is responsible for authorizing appropriations.
verb To mark (something) with one or more letters of the alphabet to indicate its brand or category.