The Companion to British History defines this as suspect linguistic usage in which familiar expressions convey different concepts from those generally understood.
The most important cases are (fam means the familiar meaning in English, ES the meaning in Eurospeak):
Council: (fam) a local authority; (ES) the European legislature.
Directive: (fam) an important rule requiring obedience enforced by a sanction; (ES) a direction to a member country to alter its law, but not in force until it does so.
European: pertaining to the geographical European continent; (ES) pertaining to the area of the EEC or EU for the time being.
Parliament: (fam) a sovereign legislature; (ES) an official discussion forum at Strasbourg.
Regulation: (fam) a minor rule made under law; (ES) the most important kind of rule, superior even to an Act of Parliament.