Orthographic projections are a method used in technical drawing to represent three-dimensional objects in two dimensions. This technique involves creating multiple views of an object, typically the front, top, and side, which are arranged in a way that accurately depicts the object's shape and dimensions without distortion. These projections are essential in fields like engineering and architecture, as they provide clear and precise information for manufacturing and construction. By using orthographic projections, designers can communicate their ideas effectively, ensuring that everyone involved understands the specifications of the object being created.