Sneeze \Sneeze\, v. i. [imp. & p. p. Sneezed; p. pr. & vb. n.
 
          Sneezing.] [OE.
         snesen; of uncertain origin; cf. D.
         snuse
   to sniff, E. neese, and AS. fne['o]san.]
   To
         emit air, chiefly through the nose, audibly and violently,

           by a kind of involuntary convulsive force, occasioned by

           irritation of the inner membrane of the nose.
   [1913
         Webster]

   Not to be sneezed at, not to be despised or
         contemned; not
      to be treated lightly. [Colloq.] "He
         had to do with old
      women who were not to be sneezed
         at." --Prof. Wilson.
      [1913 Webster]