1. Not methodically or according to plan
   "he dealt with his course work casually" 
2. In an unconcerned manner
   "glanced casually at the headlines"
   - nonchalantly

See also: casual

• 28th
• 29
• 29th
• 2d
• 2nd
• 2nd lieutenant
• 3
• 3-D
• 3-dimensional
• 3-hitter
• 3-membered
• 30
• 30 minutes
• 300
• 300th
• 30th
• 31
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• 35