1. formal or serious in nature; not casual or informal

Examples

• The company requires noncasual attire for client meetings.
• She switched to a noncasual tone when discussing the budget.
• The restaurant has a noncasual atmosphere with white tablecloths and candlelight.
• His noncasual approach to the project impressed his supervisor.
• The invitation specified noncasual dress for the awards ceremony.
• They maintained a noncasual relationship focused on business matters.