1. Describing someone eccentric:
* "My grandmother is a bit dotty, but we love her dearly."
* "The old professor was known for his dotty theories about the universe."
2. Describing something silly or foolish:
* "It was a dotty idea to try to fly a kite in a hurricane."
* "The movie had a dotty plot that made no sense."
3. Describing something covered in dots:
* "The fabric had a dotty pattern of tiny red dots."
* "Her dress was a dotty masterpiece with polka dots of all sizes."
4. Describing something characterized by dots:
* "The constellation Orion is easily recognizable by its dotty shape."
* "The map was marked with dotty lines showing the different routes."
Remember that "dotty" can have slightly different meanings depending on the context. It's important to consider the nuances of the word when choosing how to use it.