toppling

verb

1. (form-of, gerund, participle, present)present participle and gerund of topple

noun

1. The act by which something is toppled.

   “And in “Central Park in the Dark” and her haunting response to “The Unanswered Question,” Sokolow evokes more small-town anomie in spare shifts of ranks, topplings and rises.”

adj

1. That which topples.

   “We analyzed data from continuous ambient vibration monitoring and concomitant crack aperture measurements at the Courthouse Mesa instability, a large toppling sandstone slab in Utah, USA.”