bay1
  
  n.
 a broad curved inlet of the sea.
 
  Etymology
  ME: from OFr. baie, from Old Sp. bahia.
 
  
    
bay2
  
  n.
 an evergreen, purple-berried Mediterranean shrub, with aromatic leaves that are used in cookery. 
[
Laurus nobilis.]
 
  Etymology
  ME (denoting the laurel berry): from OFr. baie, from L. baca ‘berry’.
 
  
    
bay3
  
  n.
    - a window area that projects outwards from a wall.
 - a section of wall in the nave of a church between two buttresses or columns.
 - an area specially allocated or marked off:
 a loading bay.
 - 
(also bay platform)
 Brit. a short terminal platform at a railway station also having through lines.
 
 
  Etymology
  ME: from OFr. baie, from baer ‘to gape’, from med. L. batare.
 
  
    
bay4
  
  adj.
 (of a horse) brown with black points.
n.
 a bay horse.
 
  Etymology
  ME: from OFr. bai, from L. badius.
 
  
    
bay5
  
  v.
 (of a dog) bark or howl loudly, especially in pursuit of quarry.
n.
 the sound of baying.
 
  Phrase
  
    - at bay
 trapped or cornered.  - bay for blood
 demand retribution.  - hold 
(or keep)
 at bay
 prevent from approaching or having an effect. 
   
  Etymology
  ME: from OFr. (a)bai (n.), (a)baiier (v.) ‘bark’; imitative.