In Ancient Roman tradition, acclamatio was the public expression of approbation or disapprobation, pleasure or displeasure, etc., by loud acclamations. On many occasions, there appear to have been certain forms of acclamations always used by the Romans; as, for instance, at marriages, , , or ; at triumphs, ; at the conclusion of plays the last actor called out to the spectators; orators were usually praised by such expressions as , , , etc.