1.marked by blithe unconcern;
an ability to interest casual students
2.without or seeming to be without plan or method; offhand;
a casual remark
3.suited for everyday use;
casual clothes
4.occurring or appearing or singled out by chance;
their accidental meeting led to a renewal of their friendship
5.hasty and without attention to detail; not thorough;
a casual (or cursory) inspection failed to reveal the house's structural flaws
6.employed in a specified capacity from time to time;
casual employment
7.characterized by a feeling of irresponsibility;
a broken back is nothing to be casual about; it is no fooling matter
8.natural and unstudied;
using their Christian names in a casual way
9.not showing effort or strain;
a difficult feat performed with casual mastery