cow  
 noun uk/kaʊ/ us/kaʊ/
  (ANIMAL)         
 A1 [ C ]母牛,奶牛 
a large female farm animal kept to produce meat and milk
  a dairy cow 奶牛 
  [ C ](象、鲸、海豹等)雌性动物 
a large female adult mammal such as an elephant, a whale, or a seal
  a cow elephant 母象 
 - More examples
 - The farmer called the vet out to treat a sick cow.
 - We watched the cow suckling her calves.
 - The cows were grazing in the meadow.
 - We visited a dairy farm and saw the cows being milked.
 - A cow goes 'moo' and a dog goes 'bow-wow'.
 
  (WOMAN)      
  [ C ] UK offensive蠢婆娘;泼妇 
an unkind or unpleasant woman
  You stupid cow! 你这个蠢婆娘! 
   (UNPLEASANT THING)      
 [ S ] Australian English informal难办的事;讨厌的事情 
something difficult or unpleasant
  It's been a cow of a day. 真是令人难受的一天。 
 Idioms      
have a cowidiom US informal (UK have kittens) 心慌意乱;焦躁;恼怒
to be very worried, upset, or angry about something
  My mother had a cow when I said I was going to buy a motorbike. 我说我要买辆摩托车时,我母亲很是不安。 
 till/until the cows come homeidiom  长时间地;很久
for a very long time
  I could sit here and argue with you till the cows come home, but it wouldn't solve anything. 我可以坐在这里无休止地跟你争论下去,但那样不解决任何问题。 
 cow       
verb [ T usually passive ] uk/kaʊ/ us/kaʊ/
 (以威胁或暴力)使害怕,吓唬,恐吓
to frighten someone into doing something, using threats or violence
  The protesters refused to be cowed into submission by the army. 抗议者拒绝向军队低头。