An umbrella is a portable, hand-held device designed to protect a person from rain or sunlight. It typically consists of a circular fabric or plastic canopy supported by a framework of metal or fiberglass ribs, which are attached to a central pole or shaft. The canopy is often made from waterproof or UV-resistant material and can be collapsed when not in use, making it easy to carry and store. Umbrellas come in various sizes, colors, and designs, and some may include features like automatic open/close mechanisms, wind-resistant frames, or ergonomic handles.