Zero/ˈzɪrəʊ/ Definition 1 of 4Pro Tip 1/3Complete Absence Zero expresses nothingness, absence of any amount or quantity. I checked and there are zero messages in the inbox. Pro Tip 2/3Starting Point Used to indicate the starting point or ground level in measurements. The scale must be set to zero before weighing your items. Pro Tip 3/3Informal Intensity Colloquially, 'zero' can emphasize the lack of something. There's zero chance I'll make it on time in this traffic.