Casual clothes are ones that you normally wear at home or on holiday, and not on formal occasions. I also bought some casual clothes for the weekend. formal + casually casu·al·ly They were smartly but casually dressed
Happening or coming to pass without design, and without being foreseen or expected; accidental; fortuitous; coming by chance
without or seeming to be without plan or method; offhand; "a casual remark"; "information collected by casual methods and in their spare time"
One who receives relief for a night in a parish to which he does not belong; a vagrant
A person who receives Casual Holiday Pay payments each pay instead of accruing annual leave (See Casual Holiday Pay)
Casual work is done for short periods and not on a permanent or regular basis. It became increasingly expensive to hire casual workers. = temporary permanent