The meaning of a sentence, thanks. context: Becky and Susan, the six-year-old twins, were alike as two peas in a pod, a stocky pair with stiff little braids of yellow hair and blue eyes.They too wore sunbonnets and dresses of gray holland, short in the sleeve and neck but gathered round the waist into full skirts that flapped about their bare ankles. ====================== What is the meaning of "gathered round the waist "and"gathered round the waist into full skirts"?