Umnyango womlilo ungumnyango ongahlangabezana nezidingo zokuzinza kokumelana nomlilo, ubuqotho kanye nokushisa okushisayo phakathi nesikhathi esithile. Iminyango yomlilo ngokuvamile itholakala ezitebhisini zokuphuma ezivaliwe, amakheshi avaliwe, emithonjeni yamapayipi, njll. Uma kunzima ukumisa udonga lomlilo noma umnyango womlilo esakhiweni, kufanele kusetshenziswe umnyango wesivalo somlilo esikhundleni salokho, futhi kufanele uvikelwe ikhethini lamanzi.