ca·su·al 
/ˈkæʒəwəl/ adjective
/ˈkæʒəwəl/ adjective 1 always used before a noun : happening by chance : not planned or expected
▪ a casual encounter on the sidewalk 2 [more casual; most casual] : designed for or permitting ordinary dress, behavior, etc. : not formal
▪ casual clothes ▪ a casual restaurant ▪ The atmosphere at the meeting was quite casual. ◊Casual days are days (such as casual Fridays) when a company allows workers to dress in casual clothes. 3 [more casual; most casual] a : done without much thought, effort, or concern
▪ She takes a casual [=nonchalant] approach to her homework. ▪ He made a casual remark about her shoes.
b : not involving a close or serious relationship
▪ casual sex ▪ They are only casual acquaintances. [=they know each other but not very well] ▪ Their relationship was casual.
c : having some interest but not a lot : not serious
▪ He's a casual sports fan. 4 : happening at certain times but not on a regular basis
▪ She found only casual work.
▪ a casual encounter on the sidewalk
▪ casual clothes ▪ a casual restaurant ▪ The atmosphere at the meeting was quite casual. ◊Casual days are days (such as casual Fridays) when a company allows workers to dress in casual clothes.
▪ She takes a casual [=nonchalant] approach to her homework. ▪ He made a casual remark about her shoes.
b : not involving a close or serious relationship
▪ casual sex ▪ They are only casual acquaintances. [=they know each other but not very well] ▪ Their relationship was casual.
c : having some interest but not a lot : not serious
▪ He's a casual sports fan.
▪ She found only casual work.
— ca·su·al·ly adjective
▪ I looked casually down at my watch. ▪ He was dressed casually in jeans and a sweatshirt.
▪ I looked casually down at my watch. ▪ He was dressed casually in jeans and a sweatshirt.
— ca·su·al·ness noun [noncount]
