<p><strong>Noun</strong></p><ul><li>Architecture: a vault, having a circular plan and usually in the form of a portion of a sphere, so constructed as to exert an equal thrust in all directions</li><li>a domical roof or ceiling</li><li>a polygonal vault, ceiling, or roof</li><li>any covering thought to resemble the hemispherical vault of a building or room: the great dome of the sky</li><li>anything shaped like a hemisphere or inverted bowl</li><li>(in a dam) a semidome having its convex surface toward the impounded water</li><li>Crystallography: a form having planes that intersect the vertical axis and are parallel to one of the lateral axes</li><li>Geology: upwarp</li><li>Also called vistadome</li><li>Railroads: a raised, glass-enclosed section of the roof of a passenger car, placed over an elevated section of seats to afford passengers a full view of scenery</li><li>Horology: an inner cover for the works of a watch, which snaps into the rim of the case</li><li>a mountain peak having a rounded summit</li><li>Slang: a person's head: I wish I could get the idea into that thick dome of yours</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to cover with or as if with a dome</li><li>to shape like a dome</li><li>(used without object) to rise or swell as a dome</li></ul>