Dictionary.com defines convenient as:
1.Fitting in well with a person's needs, activities, and plans
2.Involving little trouble or effort
3.Situated so as to allow easy access to
4.Occurring in a place or at a time that is useful
That sounds about right.
Usage example:
I love my Thrive foods from Shelf Reliance. I am capable of making convenient meals for my family that fit well with our needs, activities and plans. Cooking with Thrive involves little trouble or effort. My home store, full of Thrive foods, is situated in the kitchen pantry so as to allow easy access to it. Dinner occurs now at home, around the table, at a time that is useful for all eight of us to gather. Thrive certainly is convenient!