1. slightly crazy or eccentric in behavior
Usage: informal; British
2. covered with dots or having a dotted pattern

Examples

• My dotty aunt collects vintage teapots and talks to her cats.
• The old professor seemed a bit dotty but was actually brilliant.
• She wore a dotty dress with small polka dots all over it.
• His dotty behavior at the party made everyone laugh.
• The dotty wallpaper had tiny blue dots on a white background.
• Everyone thought she was dotty for keeping so many houseplants.
• The dotty fabric would be perfect for making a summer dress.