Definition of "tahrir"

Karimi includes an extensive tahrir within the final syllable of the verse ...

2009, Owen Wright, Touraj Kiaras, Touraj Kiaras and Persian Classical Music: An Analytical Perspective, page 103

But it should be emphasized that Iran and Azerbāijān, which partake of the same musical culture, have the most intricate and highly elaborate form of tahrir in the world.

2012, Lloyd Miller, Music and Song in Persia (RLE Iran B): The Art of Avaz, page 109