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.
Schengen Visa Types. A Schengen visa obtained by any of the Schengen Area member countries allows free movement to its holder within the whole Schengen Zone regarding the European Union Schengen members as well as the EFTA Schengen members, up to its validity and period limitations. However this visa allows its holder to stay in a Schengen Zone for maximum 90 days within half the year, starting from the day one crosses the border between a Schengen member country and the non-Schengen member country.