Source : Webster's Revised Unabridged Dictionary (1913)

Rocket \Rock"et\, n. [F. roquette (cf. Sp. ruqueta, It
   ruchetta), fr. L. eruca.] (Bot.)
   (a) A cruciferous plant ({Eruca sativa}) sometimes eaten in
       Europe as a salad.
   (b) Damewort.
   (c) Rocket larkspur. See below.

   {Dyer's Rocket}. (Bot.) See {Dyer's broom}, under {Broom}.

   {Rocket larkspur} (Bot.), an annual plant with showy flowers
      in long racemes ({Delphinium Ajacis}).

   {Sea rocket} (Bot.), either of two fleshy cruciferous plants
      ({Cakile maritima} and {C. Americana}) found on the
      seashore of Europe and America.

   {Yellow rocket} (Bot.), a common cruciferous weed with yellow
      flowers ({Barbarea vulgaris}).

Rocket \Rock"et\, n. [It. rocchetta, fr. rocca a distaff, of
   German origin. Named from the resemblance in shape to a
   distaff. See {Rock} a distaff.]
   1. An artificial firework consisting of a cylindrical case of
      paper or metal filled with a composition of combustible
      ingredients, as niter, charcoal, and sulphur, and fastened
      to a guiding stick. The rocket is projected through the
      air by the force arising from the expansion of the gases
      liberated by combustion of the composition. Rockets are
      used as projectiles for various purposes, for signals, and
      also for pyrotechnic display.

   2. A blunt lance head used in the joust.

Rocket \Rock"et\, v. i. [imp. & p. p. {Rocketed}; p. pr. & vb.
   n. {Rocketing}.] (Sporting)
   To rise straight up; said of birds; usually in the present
   participle or as an adjective. [Eng.]

         An old cock pheasant came rocketing over me. --H. R.
                                                  Haggard.

Source : WordNet®

rocket
     n 1: any vehicle propelled by a rocket engine
     2: a jet engine containing its own propellant and driven by
        reaction propulsion [syn: {rocket engine}]
     3: erect European annual often grown as a salad crop to be
        harvested when young and tender [syn: {roquette}, {garden
        rocket}, {rocket salad}, {arugula}, {Eruca sativa}, {Eruca
        vesicaria sativa}]
     4: propels bright light high in the sky, or used to propel a
        lifesaving line or harpoon [syn: {skyrocket}]
     5: sends a firework display high into the sky [syn: {skyrocket}]

rocket
     v 1: shoot up abruptly, like a rocket; "prices skyrocketed" [syn:
           {skyrocket}]
     2: propel with a rocket