From Longman Dictionary of Contemporary Englishtuck in phrasal verb1 tuck somebody inCOMFORTABLE to make a child comfortable in bed by arranging the sheets around them2 tuck something ↔ inIN/INSIDE to move a part of your body inwards so that it does not stick out so much Stand up straight and tuck in your tummy.3 (also tuck into something) informalEAT to eat something eagerly The ice creams came and we tucked in. They tucked into a hearty breakfast of eggs. → tuck→ See Verb table
