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English definition of “casual”

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casual

adjective  /ˈkæʒ·u·əl/ us  

casual adjective (NOT SERIOUS)

not serious or careful in attitude; only partly interested: a casual glance at a magazine Even to the casual observer, the forgery was obvious.

casual adjective (INFORMAL)

not formal; relaxed in style or manner: We have a small office and I am very casual and wear slacks and sports shirts and things like that.

casual adjective (TEMPORARY)

not regular or frequent; temporary or done sometimes: casual laborers Casual also means slight: He was only a casual acquaintance – I didn’t know him well.

casual adjective (NOT PLANNED)

not intended or planned: a casual remark casual conversation
casually
adverb  /ˈkæʒ·ə·wə·li/ us  
We were told to dress casually for the walking tour.
(Definition of casual from the Cambridge Academic Content Dictionary © Cambridge University Press)
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