burn1
  
  v.
 (past and past part. burned or chiefly Brit. burnt)
       - (of a fire) flame or glow while consuming a fuel. 
▸use (a fuel) as a source of heat or energy.
 - be or cause to be harmed or destroyed by fire. 
▸(of the skin) become red and painful through exposure to the sun.
 ▸feel hot as a result of illness, injury, or emotion.
 - 
(be burning with)
 be entirely possessed by (a desire or emotion).
 - 
(burn out)
 become exhausted through overwork.
 - informal drive very fast.
 - 
(burn someone up)
 N. Amer. informal make someone very angry.
 - produce (a CD) by copying from an original or master copy.
 
n.
   - an injury or area of damage caused by burning. 
▸a painful sensation in the muscles experienced as a result of sustained exercise.
 - a firing of a rocket engine in flight.
 - N. Amer. & Austral./NZ an act of clearing of vegetation by burning.
 
 
  Phrase
  
    - burn one's boats 
(or bridges)
 do something which makes turning back impossible.  - burn the candle at both ends
 go to bed late and get up early.  - burn a hole in one's pocket
 (of money) tempt one to spend it quickly or extravagantly.  - burn the midnight oil
 work late into the night.  - burn rubber
 informal drive very fast. 
   
  Etymology
  OE birnan ‘be on fire’ and bærnan ‘consume by fire’, both from the same Gmc base.
 
  
    
burn2
  
  n.
 Scottish & 
N. English a small stream.
 
  Etymology
  OE burna, burn(e), of Gmc origin.