canal canal /kəˈnæl/

noun

1. Long and narrow strip of water made for boats or for irrigation  ( canal )
   long and narrow strip of water made for boats or for irrigation
    Boats floated gently along the canal, providing a scenic view for tourists.
   Boats floated gently along the canal, providing a scenic view for tourists.
   
   
2. A bodily passage or tube lined with epithelial cells and conveying a secretion or other substance  ( canal , channel , epithelial duct , duct )
   a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance
    The tear duct was obstructed
   the tear duct was obstructed
    The alimentary canal
   the alimentary canal
    Poison is released through a channel in the snake's fangs
   poison is released through a channel in the snake's fangs
   
3. (astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion  ( canal )
   (astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion
    Early astronomers mistakenly believed they observed canals on the Martian surface.
   Early astronomers mistakenly believed they observed canals on the Martian surface.
   
   

verb

1. Provide (a city) with a canal  ( canal , canalise [British] , canalize )
   provide (a city) with a canal