A round the world flight enables you to discover multiple countries around the world with on all-inclusive flight itinerary.
A "Round the World ticket" will include all flights on 1 ticket number. Generally, these tickets are valid for 12 months (subject to the rules of your specific ticket number).
You may have a round the world itinerary made up of separate tickets. Although your flights will go all of the way around the world, this is not classified as a "Round the World ticket".
If you have any questions please speak to your local STA Travel store.