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1. To fold or gather something and thrust it under or into something else. In this usage, a noun or pronoun can be used between "tuck" and "in." Would you tuck the sheets in, please? You should tuck in your shirt, or you'll look like a slob for your interview.
2. To secure something inside of something else. She tucked the money in an envelope and slipped it under the door. I tucked your glasses in the side pocket of your jacket.
3. To contract or pull in something, as a body part. In this usage, a noun or pronoun can be used between "tuck" and "in." Be sure to tuck in your arms and legs after you jump off the diving board. A dog tucking its tail in between its legs is usually frightened or upset.
4. To place someone in bed and ready them for sleep, often by actually tucking the bedsheets around them. In this usage, a name, noun, or pronoun can be used between "tuck" and "in." Do you want me or your mother to tuck you in tonight?
5. To begin eating. Often said as a direction or request. OK, tuck in before the food gets cold! The hungry child tucked in as soon as the food was in front of him.
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.