put to bed
put to bed  {v. phr.}
1. To put to rest for the night. 
Father put the three children to bed.
The boy seemed ill, so the nurse put him to bed.
2.  {informal}
To complete preparations and print. 
The newspaper was put to bed at 1:15 A.M.
The pressroom was late in putting the sports section to bed.
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Source: A Dictionary of American Idioms
