The Collaborative International Dictionary of English v.0.48:

Thrust \Thrust\, n.
   1. A violent push or driving, as with a pointed weapon moved
      in the direction of its length, or with the hand or foot,
      or with any instrument; a stab; -- a word much used as a
      term of fencing.
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            [Polites] Pyrrhus with his lance pursues,
            And often reaches, and his thrusts renews. --Dryden.
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   2. An attack; an assault.
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            One thrust at your pure, pretended mechanism. --Dr.
                                                  H. More.
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   3. (Mech.) The force or pressure of one part of a
      construction against other parts; especially (Arch.), a
      horizontal or diagonal outward pressure, as of an arch
      against its abutments, or of rafters against the wall
      which support them.
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   4. (Mining) The breaking down of the roof of a gallery under
      its superincumbent weight.
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   Thrust bearing (Screw Steamers), a bearing arranged to
      receive the thrust or endwise pressure of the screw shaft.


   Thrust plane (Geol.), the surface along which dislocation
      has taken place in the case of a reversed fault.
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   Syn: Push; shove; assault; attack.

   Usage: Thrust, Push, Shove. Push and shove usually
          imply the application of force by a body already in
          contact with the body to be impelled. Thrust, often,
          but not always, implies the impulse or application of
          force by a body which is in motion before it reaches
          the body to be impelled.
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