the first or preliminary coat of paint or size applied to a surface | the outer boundary of an artifact or a material layer constituting or resembling such a boundary |
(art) the surface (as a wall or canvas) prepared to take the paint for a painting | a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight |
a connection between an electrical device and a large conducting body, such as the earth (which is taken to be at zero voltage) | a superficial aspect as opposed to the real nature of something |
the part of a scene (or picture) that lies behind objects in the foreground | information that has become public |
a relatively homogeneous percept extending back of the figure on which attention is focused | the extended two-dimensional outer boundary of a three-dimensional object |
a position to be won or defended in battle (or as if in battle) | the outermost level of the land or sea |
a rational motive for a belief or action | |
the solid part of the earth's surface | |
material in the top layer of the surface of the earth in which plants can grow (especially with reference to its quality or use) | |
a relation that provides the foundation for something | |
the loose soft material that makes up a large part of the land surface | |