1. covered with moss; having moss growing on the surface
Usage: often used to describe old or neglected objects, structures, or natural surfaces
2. ancient, old-fashioned, or outdated
Usage: figurative use; implies something that has been around for a long time and may be neglected or obsolete

Examples

• The mossgrown stones of the old cemetery were barely visible beneath the overgrown vegetation.
• He discovered a mossgrown bench hidden deep in the forest.
• The castle's mossgrown walls told the story of centuries past.
• Her grandmother's mossgrown ideas about proper etiquette seemed quaint to the younger generation.
• The mossgrown roof of the abandoned cottage was slowly being reclaimed by nature.