Each cruiseline has a different way of saying this. There are usually three dress designations on each cruise of 7 days or longer.
There is Formal, which recommends dark suit and tie for the men and nice party dresses for the women. You will see everything from the basic black dress dressed up to sequins and sparkles.
There is Semi Formal which is sports jacket and tie for men and nice pants suit or dress for women.
There is casual which includes nice pants and shirt for men and sundress, pants and shirt, pants suit etc for women.
Hope this helps. Be prepared to come home quite addicted to cruising, ready to book the next one. Stop back in and let us know how your cruise was. We have been on Rhapsody and loved the ship. Or stop in chat some nite.
Wed chat host Tweety