The definition of dormant is someone or something inactive, sleeping or quiet. An example of dormant is a volcano that isn't currently erupting. YourDictionary definition and usage example.
It originally starred Dixie Carter as president of the design firm Julia Sugarbaker, Delta Burke as her ex-beauty queen sister and the designing firm's silent partner, Suzanne Sugarbaker, Annie Potts as head designer Mary Jo Shively, and Jean Smart as office manager Charlene Frazier.
The girl pictured above (Peyton Roi List) indeed appeared in Jessie, 27 Dresses and Sorcerer's Apprentice, but not Flashfoward. That would be the other Peyton List, a brunette - who also played Jane Siegel on Mad Men. While I don't know much about Peyton Roi List (the blond one), the actress from Mad Men (the brunette) indeed seems to be about 5ft6.