Source : Webster's Revised Unabridged Dictionary (1913)

   2. Figuratively, anything which enlightens intellectually or
      morally; anything regarded metaphorically a performing the
      uses of a lamp.

            Thy word is a lamp unto my feet, and a light unto my
            path.                                 --Ps. cxix.
                                                  105.

            Ages elapsed ere Homer's lamp appeared. --Cowper.

   3. (Elec.) A device or mechanism for producing light by
      electricity. See {Incandescent lamp}, under
      {Incandescent}.

   {[AE]olipile lamp}, a hollow ball of copper containing
      alcohol which is converted into vapor by a lamp beneath,
      so as to make a powerful blowpipe flame when the vapor is
      ignited. --Weale.

   {Arc lamp} (Elec.), a form of lamp in which the voltaic arc
      is used as the source of light.

   {D["e]bereiner's lamp}, an apparatus for the instantaneous
      production of a flame by the spontaneous ignition of a jet
      of hydrogen on being led over platinum sponge; -- named
      after the German chemist D["o]bereiner, who invented it.
      Called also {philosopher's lamp}.

   {Flameless lamp}, an aphlogistic lamp.

   {Lamp burner}, the part of a lamp where the wick is exposed
      and ignited. --Knight.

   {Lamp fount}, a reservoir for oil, in a lamp.

   {Lamp jack}. See 2d {Jack}, n., 4
      (l) &
      (n) .

   {Lamp shade}, a screen, as of paper, glass, or tin, for
      softening or obstructing the light of a lamp.

   {Lamp shell} (Zo["o]l.), any brachiopod shell of the genus
      Terebratula and allied genera. The name refers to the
      shape, which is like that of an antique lamp. See
      {Terebratula}.

   {Safety lamp}, a miner's lamp in which the flame is
      surrounded by fine wire gauze, preventing the kindling of
      dangerous explosive gases; -- called also, from Sir
      Humphry Davy the inventor, {Davy lamp}.

   {To smell of the lamp}, to bear marks of great study and
      labor, as a literary composition.

Safety \Safe"ty\, n. [Cf. F. sauvet['e].]
   1. The condition or state of being safe; freedom from danger
      or hazard; exemption from hurt, injury, or loss.

            Up led by thee, Into the heaven I have presumed, An
            earthly guest . . . With like safety guided down,
            Return me to my native element.       --Milton.

   2. Freedom from whatever exposes one to danger or from
      liability to cause danger or harm; safeness; hence, the
      quality of making safe or secure, or of giving confidence,
      justifying trust, insuring against harm or loss, etc.

            Would there were any safety in thy sex, That I might
            put a thousand sorrows off, And credit thy
            repentance!                           --Beau. & Fl.

   3. Preservation from escape; close custody.

            Imprison him, . . . Deliver him to safety; and
            return.                               --Shak.

   4. (Football) Same as Safety touchdown, below.

   {Safety arch} (Arch.), a discharging arch. See under
      {Discharge}, v. t.

   {Safety belt}, a belt made of some buoyant material, or which
      is capable of being inflated, so as to enable a person to
      float in water; a life preserver.

   {Safety buoy}, a buoy to enable a person to float in water; a
      safety belt.

   {Safety cage} (Mach.), a cage for an elevator or mine lift,
      having appliances to prevent it from dropping if the
      lifting rope should break.

   {Safety lamp}. (Mining) See under {Lamp}.

   {Safety match}, a match which can be ignited only on a
      surface specially prepared for the purpose.

   {Safety pin}, a pin made in the form of a clasp, with a guard
      covering its point so that it will not prick the wearer.
      

   {Safety plug}. See {Fusible plug}, under {Fusible}.

   {Safety switch}. See {Switch}.

   {Safety touchdown} (Football), the act or result of a
      player's touching to the ground behind his own goal line a
      ball which received its last impulse from a man on his own
      side; -- distinguished from touchback. See {Touchdown}.

Source : WordNet®

safety lamp
     n : an oil lamp that will not ignite flammable gases (methane)
         [syn: {Davy lamp}]