MT•R•NM /metrəˌnōm/ [noun] 1. a mechanical or electrical instrument that makes repeated clicking sounds at an adjustable pace, used for marking rhythm, especially in practicing music. Welcome to MTRNM, the events, music, and atmosphere LA has been missing. Working on a bi-weekly residency, MTRNM hosts a range of music-centric events across LA's most intimate and exclusive venues. All about the music, always.