Source : Webster's Revised Unabridged Dictionary (1913)

Rush \Rush\ (r[u^]sh), v. i. [imp. & p. p. {Rushed} (r[u^]sht);
   p. pr. & vb. n. {Rushing}.] [OE. ruschen; cf. AS. hryscan to
   make a noise, D. ruischen to rustle, G. rauschen, MHG.
   r[=u]schen to rush, to rustle, LG. rusken, OSw. ruska, Icel.
   & Sw. ruska to shake, Dan. ruske to shake, and E. rouse.]
   1. To move forward with impetuosity, violence, and tumultuous
      rapidity or haste; as, armies rush to battle; waters rush
      down a precipice.

            Like to an entered tide, they all rush by. --Shak.

   2. To enter into something with undue haste and eagerness, or
      without due deliberation and preparation; as, to rush
      business or speculation.

            They . . . never think it to be a part of religion
            to rush into the office of princes and ministers.
                                                  --Sprat.

Source : WordNet®

rushing
     n 1: (American football) an attempt to advance the ball by
          running into the line; "the linebackers were ready to
          stop a rush" [syn: {rush}]
     2: the act of moving hurriedly and in a careless manner; "in
        his haste to leave he forgot his book" [syn: {haste}, {hurry},
         {rush}]