Webster's English Dictionary

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dovetail

1. dove.tail \'d*v-.ta-l\ n : something resembling a dove's tail; esp : a 
   flaring tenon and a  mortise into which it fits tightly making an 
   interlocking joint between two pieces
2. dovetail vt 1a: to join by means of dovetails  1b: to cut to a dovetail  
   2a: to fit skillfully to form a whole  2b: to fit together with  : to fit 
   together into a whole