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tuck someone in(to) somethingand tuck someone in
to place someone into something carefully; to wrap someone in blankets or something similar. Father tucked Jimmy into bed an hour later than he should have. Please tuck in Jimmy.
tuck something in (to) somethingand tuck something in
to fold or stuff something into something. Please tuck your shirttail into your pants. Tuck in your shirt tail. When you make the bed, you have to tuck the sheets in.
Thrust in the edge of or end of something, such as bed linens or a shirt; also, make a child secure in bed by folding in the bedclothes. For example, Tuck in your shirt; it looks awful hanging out of your pants, or Mother went upstairs to tuck in the children. [First half of 1600s]
1. To gather something up and fold, thrust, or turn in so as to secure or confine it: The teacher told the boys to tuck in their shirts. I threw the sheet over the bed and tucked it in at the corners.
2. To make someone secure in bed for sleep, especially by tucking bedclothes into the bed: I tucked in my daughter and said good night. The babysitter tucked the little boy in.
3. To draw in some body part; contract something: She tucked in her arms and shook her head. The turtle tucked in its head.
4. Slang To begin to eat heartily: Dinner was served, and we tucked in.