The phrase "ticketed passengers" refers to people who have bought a ticket to travel on a particular mode of transportation, such as a plane, train, or bus. It doesn't include those who haven't purchased a ticket. Full definition
While your fare is technically nonrefundable, if you must miss your flight, the fare can be applied toward future travel on Southwest Airlines (for the originally ticketed passenger only). (upgradedpoints.com)
Keep in mind that you are still subject to the airline rules of one carry - on and one personal item per ticketed passenger, even if you are toting a pump or milk. (breastfeedbabywearclothdiaper.com)
Remember, if the flight is cancelled or delayed due to severe weather, the airline has no responsibility to help but many will allow ticketed passengers make changes to their reservations for free. (travelinsurancereview.net)