Definition: the uniform worn by mothers making it possible to identify them from a distance, even when their children are not present.
The momiform of old consisted of "mom" jeans, a t-shirt, athletic shoes and a scrunchie.
Looming around shopping centers and elementary schools, you will notice a bevy of women in yoga pants, tank tops (a hoodie if the weather deems it appropriate) and large sunglasses. This is the momiform of the new generation of mothers.
The classic momiform can still be spotted. But it is becoming the stuff of legends. Like Bigfoot and UFOs, they are seen from time to time. Mothers rocking the classic momiform are beyond fashion's reach and probably still wear a double-breasted blazer with shoulder pads on occasion.
Those that don the new, more hip momiform are still capable of wearing non-elastic pants when they step outside of their motherly duties.