The definition of advisable is something that is a good idea to do, something that you are meant to do or something that would be beneficial to do.
An example of an advisable decision is when it is raining and it becomes clear that it is better to take a taxi than to drive.
suitable for offering as advice; that can be recommended; wise; sensible
Worthy of being recommended or suggested; prudent.
- ad·vis′a·bil′i·ty, ad·vis′a·ble·ness