1. a body of coherent matter, usu. of indefinite shape: a mass of dough. 2. a collection of incoherent particles, parts, or objects regarded as forming one body: a mass of sand. 3. aggregate; whole: People, in the mass, mean well. 4. a considerable number or quantity: a mass of errors. 5. bulk; massiveness: towers of great mass and strength.
The duration is counted from the date of the first entry into the Schengen-Area. A Schengen-Visa with the validi ty of one year or more and a registered duration of stay of 90 days permits you, however, to stay in the Schengen-Area for a maximum period of 90 days per half-year (in Germany or other Schengen-Countries).or example: A person has a Schengen-Visa that is valid from 1 January 2013, until 31 December 2013, i.e. for one year. On 18 October 2013, this person (i.e. the visa holder) is in the Schengen-Area.
What the Schengen Visa Gives You. The Schengen visa allows a maximum of 90 days travel in Schengen countries you've applied to visit, for every 180 days period. It can be single or multiple entry. The day of your arrival and departure count as full days towards the 90.