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An acclamation, in its most common sense, is a form of election that does not use a ballot. "Acclamation" or "acclamatio" can also signify a kind of ritual greeting and expression of approval in certain social contexts in ancient Rome.
The most frequent type of acclamation is a voice vote, in which the voting group is asked who favors and who opposes the proposed candidate. In the event of a lack of opposition, the candidate is considered elected.
This form of election is most commonly associated with papal elections (see Acclamation in papal elections), though this method was discontinued by Pope John Paul II's apostolic constitution Universi Dominici Gregis. It is also sometimes found in the context of parliamentary decisions, or United States presidential nominating conventions (where it is often used to nominate the running mate and incumbent Presidents).
It is a famous tradition at the University of St Andrews Union Debating Society, which is the oldest in the world, to take the minutes as read each week by oral acclamation.
In Canada, a candidate for a parliamentary, legislative or municipal position is said to be elected by acclamation if he or she has no opponents for the seat, an eventuality that rarely occurs except for legislative elections in the northern territories and municipal elections. The last instance of an acclamation in an election to the Canadian House of Commons was in 1957 when George Henry Doucett was acclaimed in a by-election following the death of his predecessor William Gourlay Blair. Just two months before, Chesley William Carter had been the last person to be acclaimed in a general election. In the Northwest Territories riding of Inuvik Boot Lake, the incumbent Floyd Roland was returned by acclamation in two consecutive elections - 2003 and 2007.
In ancient Rome 
Acclamations were ritual verbal expressions of approval and benediction in public (like gladiatorial games) and private life. The departure and return of imperial magistrates was, for example, accompanied by acclamation. In the later Roman Empire, essions of goodwill were reserved for the emperor and certain relatives, who were greeted in this manner during public appearances on special occasions such as their birthdays. By the 4th century AD, acclamations were compulsory for high-level imperial officials.
See also 
- "Elected by acclamation". Electoral Results. Parliament of Canada. Archived from the original on 22 June 2008. Retrieved 2008-06-24.
- Results of the 2003 Northwest Territories election - Elections NWT. Retrieved 2010-01-11.