tuck in verb 7tuck-in noun 2forms 4 verb7 •To push (the fabric at the bottom of a shirt) under the pants. •To eat heartily.Tuck in, before the food goes cold. •To place in a small space."Tuck it in that corner." •To pull the blankets or duvet up over (someone in bed); to put (someone) to bed.She tucked in her young son and turned out the light. •To pull the blankets or duvet up over oneself; to get in bed.Life on the island feels great! When the sun rises, I wakey-wakey, and when it sets, I tuck in fer snoozer-time! Perfect fer a simple bloke like me, right? — 2004 •To score from with a casual motionAnd although Steven Fletcher cut the deficit for Wolves, tucking in Stephen Hunt's cross, the home side held on. — 2011 •To acquire something tiny tuck-in noun2 •The process of putting a child to bed and tucking the covers around them. •(slang) A hearty meal. formstucked in · tucking in · tucks in · tuck-ins