Release Train
In plain terms
Shipping features on a fixed, regular schedule.
Going deeper
A release train bundles whatever's ready into scheduled releases that 'leave on time' regardless of which features made it. It enforces predictable cadence.
Under the hood
Features that miss the train wait for the next; reduces release coordination overhead at scale.
Examples
Scaled Agile (SAFe), scheduled releases, fixed-cadence shipping, browser releases.
Think of it like...
Like a train departing on schedule, you board what's ready or catch the next one.