Morn/mɔːrn/ Definition 1 of 2Pro Tip 1/3Time Specific Morn is used to describe the early part of the day; it's not used for afternoons or evenings. She jogs every morn before the city wakes. Pro Tip 2/3Less Common 'Morn' is less common in everyday conversation and is often replaced by 'morning'. Good morn! Oh wait, most people just say 'Good morning'. Pro Tip 3/3Poetic Feel Using 'morn' instead of 'morning' can give a poetic or old-fashioned feel to your language. She reminisced about the joys of morn.