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Define the word obturate

"Obturate" gcide "The Collaborative International Dictionary of English v.0.48"

Obturate \Ob"tu*rate\, v. t. [imp. & p. p. Obturated; p. pr. &
   vb. n. Obturating.] [L. obturatus; p.p. of obturare.]
   To stop or close, as an opening; specif., (Ordnance), to stop
   (a gun breech) so as to prevent the escape of gas in firing.
   [Webster 1913 Suppl.]

"obturate" wn "WordNet (r) 2.0"

obturate
     v : block passage through; "obstruct the path" [syn: obstruct,
          impede, occlude, jam, block, close up] [ant: free]