Happening by chance. / Coming without regularity; occasional or incidental. / Employed irregularly. / Careless. / Happening or coming to pass without design. / Informal, relaxed.

(Britain, Australia, New Zealand) A worker who is only working for a company occasionally, not as its permanent employee.

The state of being casual. / A relaxed and nonchalant attitude.

plural of casualness

plural of casualism

plural of casualization

plural of casual Friday

plural of casual game

(video games) A video game targeting casual, irregular gamers, typically having few rules to learn and a low initial level of difficulty.

Any standard of dress used in many business environments that excludes certain casual and overly formal clothes, such as (for men) a business suit and tie.