Australia
To have Australia in your dream depend almost entirely on whether you have lived there, born there or whether it is an unknown for you. So you need to ask yourself what associations you have with the land.
But in general it could mean for many opportunity, hard-headedness, practicality, dubiousness about the irrational. See: Abroad; Australian aboriginal dream beliefs.
Useful Questions and Hints:
See Processing Dreams and Talking As to find out what your associations are – also Association of Ideas with Dreams.