Verb
(transitive) To pull the blankets or duvet up over (someone in bed); to put (someone) to bed.
Synonym: tuck in
(intransitive) To pull the blankets or duvet up over oneself in bed.
(transitive) To push the fabric at the bottom of a garment into itself or under another garment (especially trousers, skirt, dress etc.)
Synonym: tuck in
(intransitive, boxing) To protect one's face by covering it with the gloves
(intransitive) to bring one's legs and abdomen together while lying face-up on the floor; to perform a tuck-up
(transitive, slang, obsolete) To execute by hanging.
Source: en.wiktionary.org