Synonym: accidental, chance, informal, natural, unexpected. Antonym: planned. Similar words: casualty, as usual, visual, unusual, persuade, measure up, measure up to, measurement. Meaning: ['kæʒjʊəl] 
adj. 1. marked by blithe unconcern 2. without or seeming to be without plan or method; offhand 3. suited for everyday use 4. occurring or appearing or singled out by chance 5. hasty and without attention to detail; not thorough 6. occuring from time to time 7. characterized by a feeling of irresponsibility 8. natural and unstudied 9. not showing effort or strain.
adj. 1. marked by blithe unconcern 2. without or seeming to be without plan or method; offhand 3. suited for everyday use 4. occurring or appearing or singled out by chance 5. hasty and without attention to detail; not thorough 6. occuring from time to time 7. characterized by a feeling of irresponsibility 8. natural and unstudied 9. not showing effort or strain. 
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31. Casual clothes are the order of the day.
32. He sidled past, trying to seem casual.
33. His clothes were artfully arranged to look stylishly casual.
34. John just wanted casual sex .
35. I was wrong about it being a casual meeting.
36. The whole idea evolved from a casual remark.
37. 80% of burglaries are committed by casual opportunists.
38. They had been conducting a casual affair for years.
39. She dresses with casual elegance.
40. To a casual observer, everything might appear normal.
41. They are employed on a casual basis .
42. He was very casual about it all.
43. I also bought some casual clothes for the weekend.
44. He read love into her casual friendliness.
45. His attitude to his job is rather casual.
46. The disease is not spread by casual contact.
47. Marsha was quite casual about appearing on TV.
48. He earns a living by casual labour.
49. Her casual dismissal of the threats seemed irresponsible.
50. Young people today lean towards casual clothes.
51. To the casual observer Mary seemed quite calm.
52. The psychologist's attitude seemed far too casual,(sentencedict .com) even brutal.
53. Security around the conference hotel seemed almost casual.
54. She's a very casual person.
55. He made some casual remark about her holiday.
56. She will never be more than a casual acquaintance.
57. He wore casual country tweeds.
58. We are starting a new line in casual clothes.
59. Add a scarf for a casual effect.
60. Chris has occasional casual work but mostly he is unemployed.
More similar words: casualty, as usual, visual, unusual, persuade, measure up, measure up to, measurement, all of a sudden, case, in case, casino, cash in, in case of, cash in on, manual, actual, sexual, mutual, annual, ritual, in any case, sexually, qualify, annually, virtual, actually, cast aside, in this case, broadcast.