- Refers to the context of or associated specifically with the modern political entity of the United States of America.
- Prints produced from designs created by the aquatint process, by which a printing plate is covered with a coating and etched with acid so as to create a range of tonal values, often combined with line work. The resulting print resembling a watercolor.
- The process of adding color, or changing or altering the color of something, whether by penetrating, coating, or by electronic means. For the state of having color, use "colored (perceived attribute)."
- Prints on paper incorporating impressions of a reverse design created on a printing plate, usually copper, into which the design has been incised (engraved) using burins or gravers. Historically, "engravings" has sometimes been incorrectly used to refer to all prints, regardless of the specific technique. For prints made from designs engraved on a flat wooden block, use "wood cuts"; for prints made from a plate that is etched rather than engraved, use "etchings."
- Prominent landforms rising considerably above the surrounding area, typically having steep slopes, a sharp summit area, and large mass. Mountains rarely occur individually, and in most cases, are found in ranges, chains, or systems.
- Refers generally to all types of thin matted or felted sheets or webs of fiber formed and dried on a fine screen from a pulpy water suspension. The fibers may be animal, such as hair, silk or wool, or mineral, such as asbestos, or synthetic. However most paper is made from cellulosic plant fiber, such as from wood pulp, grass, cotton, linen, and straw.
- Boats having sails as their primary means of propulsion.