This term corresponds to definition 2.
There are multiple definitions - click on the translation that matches your context.
a particular activity, custom, method or proceeding etc
Although legal, the practice is discouraged by European publishers.
a profession or business that involves a lot of skill or training, especially law and medicine; an example of this (eg a legal practice, a doctor's general practice)
Gianni Manca is a member of a leading legal practice in Rome, but also runs a legal firm in East Lothian.
the application of a belief or an idea rather than the theory behind that belief or idea
They follow the religious practices established by the ancient church.