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

• Île-de-France
• Übermensch
• à la carte
• écarté
• éclat
• égalité
• élan vital
• émigré
• éminence grise
• épée
• étude
• étui
• 0
• overlook
• overlooked
• overlooking
• overlord
• overlordship
• overly
• overlying
• overman
• overmantel
• overmaster
• overmatch
• overmodest