What does it mean for my dermatitis to be "atopic? "

Atopy (see below) Asthma, eczema, & allergies are "atopic" diseases. "atopy" is an inherited tendency for developing any of these diseases. That being said... If you already have one of these diseases or have a close blood-relative who does, you have a higher risk (than those who don't) of getting any atopic disease. Note: an increased risk does not mean you actually will get any or all of these diseases.
Atopy. Atopy means the predisposition to develop allergic conditions. Atopic dermatitis is better known as eczema, a chronic inflammatory skin condition due, more often than not, to allergic irritants.