turn in

definition: prepare for sleep
example: I usually turn in at midnight
speech part: verb
synonyms: go to bed
definition: carry out (performances)
example:
speech part: verb
synonyms: put on
definition: make an entrance by turning from a road
example:
speech part: verb
synonyms:
definition: to surrender someone or something to another
example:
speech part: verb
synonyms: render

How turn in is being used?