1. comparative form of musty; having a stronger stale, damp, or moldy smell or taste

Examples

• The basement smelled even mustier after the flood.
• This old book is mustier than the others on the shelf.
• The attic grew mustier with each passing year.
• Her grandmother’s house felt mustier in the summer humidity.
• The wine cellar was mustier than expected.
• These old clothes are getting mustier in storage.