Significatio vocis plangor | Babel Free

Definitiones

1. striking, beating; especially, beating the head and breast as an expression of mourning
   declension-3, masculine
2. grief, loud mourning, wailing, crying
   declension-3, masculine

Exempla

“resonat magnīs plangōribus aether”

heaven resounds with loud grief (The people of Carthage grieve for Dido: The full meaning in-context probably includes the sounds of the first definition.)

Gradus CEFR