LDI may refer to: Lady Davis Institute for Medical Research in Montreal, Canada Lawrenceburg Distillers Indiana, the former name of the distillery MGP of Indiana Liberty Diversified Industries Liability-driven investment strategy IATA airport code for Lindi Airport LVDS Display Interface, a low-voltage differential signaling interface for flat-panel displays Laser Direct Imaging, a type of photoplotting La droite indépendante, a former French electoral alliance