Address terms are linguistic expressions used by a speaker to start conversation or call someone. George Yule defines address form as a word or phrase that is used for a person to whom speaker wants to talk. Address forms or address terms are socially oriented and expose the social relationship of interlocutors. Maloth explains "When we address a person we should use suitable term depending on the appropriate situation where we are in". Moreover social situations determine the use of a suitable address form for a person. A style of office, also called manner of reference, or form of address when someone is spoken to directly, is an official or legally recognized form of reference for a person or other entity (such as a government or company), and may often be used in conjunction with a personal title. A style, by tradition or law, precedes a reference to a person who holds a post or political office and is sometimes used to refer to the office itself. An honorific can also be awarded to an individual in a personal capacity. Such styles are particularly associated with monarchies, where they may be used by a wife of an office holder or of a prince of the blood, for the duration of their marriage. They are also almost universally used for presidents in republics and in many countries for members of legislative bodies, higher-ranking judges, and senior constitutional office holders. Leading religious figures also have styles.

The second-person (singular and plural) possessive adjective your is used as a form of address (that is, when speaking directly to the person[s] entitled to the style[s]); the third-person possessive adjectives his/her' (singular) and their (plural) are used as forms of reference (that is, when speaking about the person[s] entitled to the style[s]).

Traditional forms of address at German-speaking universities:

Traditional forms of address at Dutch-speaking universities:

Traditional forms of address at Italian-speaking universities:

General tradition indicates that monarchs who have ceased to reign but not renounced their hereditary titles, retain the use of their style and title for the duration of their lifetimes, but both die with them. Hence, prior to his death, Greece's deposed king was still styled His Majesty King Constantine II, as a personal title, not as occupant of a constitutional office, since the abolition of the monarchy by the Hellenic Republic in 1974. Similarly, until his death, the last King of Italy, Umberto II, was widely referred to as King Umberto II and sometimes addressed as Your Majesty. In contrast, Simeon of Bulgaria who, subsequent to the loss of his throne in 1947, was elected to and held the premiership of his former realm as "Simeon Sakskoburggotski", and therefore is as often referred to by the latter name as by his former royal title and style.

While this rule is generally observed, and indeed some exiled monarchs are allowed diplomatic passports by their former realm, other republics officially object to the use of such titles which are, nonetheless, generally accorded by extant monarchical regimes. In 1981, the then Greek President Konstantinos Karamanlis declined to attend the wedding of Charles, Prince of Wales when it was revealed that Greece's deposed monarch, a cousin of the Prince, had been referred to as "King" in his invitation. The current Hellenic Republic challenged King Constantine's right to use his title, and his passport was revoked in 1994, because he did not use a surname, as his passport at the time stated "Constantine, former King of the Hellenes". However, Constantine II later travelled in and out of Greece on a Danish diplomatic passport as a descendant of Christian IX of Denmark, by the name Constantino de Grecia (Spanish for "Constantine of Greece").

Known as terasul in the Malay language.