1) It literally means to secure; to maintain, to keep safe; to preserve (from doing something). In practice, within the area of Administrative Control, usually the government or State provisions order to the citizens to restrain from certain behavior – for example, passing through certain streets during non-regulated protests or during performance repair works, etc.
2) It also means to hold together; to connect (to each other). In the legal practice, the aim of every concluded contract is to hold the parties legally together i.e. to oblige them for certain period of time towards each other. Another example lays in the sphere of Family Law, where the wedlock has the goal to connect legally two spouses towards each other – i.e. to create rights and obligations for them in relation to creating a family and taking care of each other.