Source : Webster's Revised Unabridged Dictionary (1913)

Hush \Hush\, v. t. [imp. & p. p. {Hushed}; p. pr. & vb. n.
   {Hushing}.] [OE. huschen, hussen, prob. of imitative origin;
   cf. LG. hussen to lull to sleep, G. husch quick, make haste,
   be silent.]
   1. To still; to silence; to calm; to make quiet; to repress
      the noise or clamor of.

            My tongue shall hush again this storm of war.
                                                  --Shak.

   2. To appease; to allay; to calm; to soothe.

            With thou, then, Hush my cares?       --Otway.

            And hush'd my deepest grief of all.   --Tennyson.

   {To hush up}, to procure silence concerning; to suppress; to
      keep secret. ``This matter is hushed up.'' --Pope.