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