Definition of "casual" []

• Occurring by chance. See Synonyms at chance. (adjective)
• Occurring at irregular or infrequent intervals; occasional: casual employment at a factory; a casual correspondence with a former teacher. (adjective)
• Unpremeditated; offhand: a casual remark. (adjective)
• Being without ceremony or formality; relaxed: a casual evening with friends. (adjective)
• Suited for everyday wear or use; informal. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In a way, I think the issue here is that there are two very different senses of the term casual that we could think about with the MMOG marketplace."
• "More pertinently, I'm deeply dubious about the word "casual" when it comes to relationships of the heart."
• "They've really just been having what they describe as casual conversations with him."