1. [n]  a jet engine containing its own propellant and driven by reaction propulsion
2. [n]  any vehicle propelled by a rocket engine
3. [n]  sends a firework display high into the sky
4. [n]  propels bright light high in the sky, or used to propel a lifesaving line or harpoon
5. [n]  erect European annual often grown as a salad crop to be harvested when young and tender
6. [v]  propel with a rocket
7. [v]  shoot up abruptly

Rocket
When Kipper and Tiger launch a remote-controlled rocket with Sock Thing as the astronaut, they wonder if they will ever see Sock Thing again.

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1. \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}).
   

2. \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.
   {Congreve rocket}, a powerful form of rocket for use in war,
      invented by Sir William Congreve. It may be used either in
      the field or for bombardment; in the former case, it is
      armed with shells or case shot; in the latter, with a
      combustible material inclosed in a metallic case, which is
      inextinguishable when kindled, and scatters its fire on
      every side.
   

3. \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.