go to sleep vs slumber

go to sleep

• To fall asleep. 

• To be affected by paresthesia; to go numb. 

• To die. 

slumber

• To be in a very light state of sleep, almost awake. 

• To be inactive or negligent. 

• A state of ignorance or inaction. 

• The snooze button on an alarm clock. 

• A very light state of sleep, almost awake.