For the purposes of this Directive, the following definitions apply:

1. (a)

   ‘third-country national’ means a person who is not a citizen of the Union within the meaning of Article 20(1) TFEU;

2. (b)

   ‘third-country worker’ means a third-country national who has been admitted to the territory of a Member State and who is legally residing and is allowed to work in the context of a paid relationship in that Member State in accordance with national law or practice;

3. (c)

   ‘single permit’ means a residence permit issued by the authorities of a Member State allowing a third-country national to reside legally in its territory for the purpose of work;

4. (d)

   ‘single application procedure’ means any procedure leading, on the basis of a single application made by a third-country national, or by his or her employer, for the authorisation of residence and work in the territory of a Member State, to a decision ruling on that application for the single permit.