to push, fold or turn the ends or edges of clothes, paper, etc. so that they are held in place or look neat 把（衣服、纸张等的边缘）塞进，折叠，卷起
She tucked up her skirt and waded into the river.
她撩起裙子蹚水走进河里。
The sheets should be tucked in neatly (= around the bed).
床单的四边应整整齐齐地掖在褥垫下面。
Tuck the flap of the envelope in.
把信封的口盖塞进信封里。