AGREMENTS (Ital. abbellimenti; Ger. Manieren; Eng. ornaments), in music, are supplementary notes, or embellishments, introduced for the purpose of enriching, elaborating or otherwise altering the effect of the phrase or melody to which they are applied. As employed in connection with the older types of music, alike vocal and instrumental, they assumed a large variety of forms (acciaccatura, appoggiatura, arpeggio, mordent, shake, turn, and so on) which in course of time became definitely standard izedand so formed an essential part of the music, although nomi nally left to the discretion of the performer and indicated, if at all, only by conventional signs.