drop off

Verb

• get worse
  • My grades are slipping
    

• retreat

• leave or unload
  • unload the cargo
    
  • drop off the passengers at the hotel
    

• change from a waking to a sleeping state
  • he always falls asleep during lectures
    

• fall or diminish
  • The number of students in this course dropped off after the first test
    

Related words

• Synonyms: 
  slip , drop away , fall away , fall back , lose , fall behind , recede , drop , set down , put down , unload , discharge , fall asleep , dope off , flake out , drift off , nod off , doze off , drowse off
• Antonyms: 
  gain , advance , win , pull ahead , make headway , get ahead , gain ground , wake up , awake , arouse , awaken , wake , come alive , waken