A description that appeals to the senses (what is seen, heard, smelled, tasted or touched) and makes the reader perceive the scene, not only understand it.
In Paradise
I well perceived that it was of high praise, for there came to me "Resurge" and "Conquer" like one who does not understand but hears
Hearing leads the passage: Dante catches only two words of the hymn, "Resurge" and "Conquer", and deduces the rest from them. The reader listens with him to a canto whose words are lost, and perceives through sound the praise he cannot translate.
Cantos XIII to XVI: The Sun and Mars, Dante, narrator, hearing the hymn of the cross of Mars
why does my face so enamor you that you do not turn to the fair garden that flowers beneath the rays of Christ? There is the rose in which the divine Word became flesh; there are the lilies, by whose scent the good path was taken
Cantos XXI to XXIV: Saturn and the fixed stars, Beatrice, to Dante, at the triumph of Christ
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