In jurisprudence, a de facto law (also known as a de facto regulation) is a law or regulation that is followed but "is not specifically enumerated by … 展开

A de facto standard is a standard (formal or informal) that has achieved a dominant position by tradition, enforcement, or market dominance. It has not necessarily received formal approval … 展开

Most commonly used to describe large scale conflicts of the 20th century, the phrase de facto state of war refers to a situation where two … 展开

Monopoly
A de facto monopoly is a system where many suppliers of a product are allowed but the market is so completely dominated by one that the other players are unable to compete or even survive. The related terms 展开

National languages
Several countries, including Australia, Japan, Mexico, the United Kingdom and the United States, have a de facto national language but … 展开

Relationships
A domestic partner outside marriage is referred to as a de facto husband or wife by some authorities.
In Australia and New Zealand 展开

• Fact
• Unenforced law
• Convention (political norm) 展开