Is a door a linkage

A door is not typically classified as a linkage. A linkage refers to a mechanical system of interconnected components that work together to transmit motion or forces, often involving multiple pivots or joints. While a door does pivot on its hinges, it functions primarily as a barrier or entryway rather than as part of a complex mechanical system. Therefore, while it has moving parts, it doesn't meet the criteria of a linkage in mechanical terms.