ACCLAMATION, in deliberative or electoral assemblies, a spontaneous shout of approval or praise (Lat. acclamatio), the adoption of a resolution or the passing of a vote of confidence or choice unanimously, in distinction from a ballot or divi sion. In the Roman senate votes were passed by acclamation in such forms as Omnes, omnes, Aequum est, Iustum est, etc.; and the praises of the emperor were celebrated in prearranged sentences by the whole body of senators.
In ecclesiastical councils vote by acclamation is common, the question being put in the form, placet or non placet. The Sacred College has elected popes by acclamation, when the cardinals simultaneously "acclaimed" one of their number as pontiff. In modern parliamentary usage a motion is carried by acclamation when approval is expressed by shouting such words as Aye or Agreed.