noun - a large constellation in the northern sky, also known as the Great Bear; it contains the asterism called the Big Dipper
noun - the section at the top of a document or page that contains information such as the title, date, or page number
noun - a continuous range or sequence of something, such as wavelengths of light, or the range of different opinions, activities, or qualities
noun - a camera that captures photographs or videos in digital format, storing the images as electronic data rather than on traditional film