The definition of dismissive is showing indifference or disregard, or suggesting that something isn't worth attention or consideration.
When you disregard someone's ideas and aren't willing to listen to them at all, this is an example of a time when you are dismissive to his ideas.
- Rare dismissing or expressing dismissal
- haughty and contemptuous, condescending, etc. in dismissing from consideration
- Serving to dismiss.
- Showing indifference or disregard: a dismissive shrug.