n.
    - the side of a person's or animal's body between the ribs and the hip.
- the side of a large object or structure.
- the left or right side of a body of people. ▸the right or left side of a chessboard or similar gaming area. 
- 
(also flank forward)
 Rugby  another term for wing (in sense 8).
v.
 be situated on each or on one side of.
Phrase
  
    
      - in flank
 Military  at the side.
 
  Etymology
  OE, from OFr. flanc, of Gmc origin.