Source : Webster's Revised Unabridged Dictionary (1913)

Nature \Na"ture\ (?; 135), n. [F., fr. L. natura, fr. natus
   born, produced, p. p. of nasci to be born. See {Nation}.]
   1. The existing system of things; the world of matter, or of
      matter and mind; the creation; the universe.

            But looks through nature up to nature's God. --Pope.

            Nature has caprices which art can not imitate.
                                                  --Macaulay.

   2. The personified sum and order of causes and effects; the
      powers which produce existing phenomena, whether in the
      total or in detail; the agencies which carry on the
      processes of creation or of being; -- often conceived of
      as a single and separate entity, embodying the total of
      all finite agencies and forces as disconnected from a
      creating or ordering intelligence.

            I oft admire How Nature, wise and frugal, could
            commit Such disproportions.           --Milton.

   3. The established or regular course of things; usual order
      of events; connection of cause and effect.

   4. Conformity to that which is natural, as distinguished from
      that which is artifical, or forced, or remote from actual
      experience.

            One touch of nature makes the whole world kin.
                                                  --Shak.

   5. The sum of qualities and attributes which make a person or
      thing what it is, as distinct from others; native
      character; inherent or essential qualities or attributes;
      peculiar constitution or quality of being.

            Thou, therefore, whom thou only canst redeem, Their
            nature also to thy nature join, And be thyself man
            among men on earth.                   --Milton.

   6. Hence: Kind, sort; character; quality.

            A dispute of this nature caused mischief. --Dryden.

   7. Physical constitution or existence; the vital powers; the
      natural life. ``My days of nature.'' --Shak.

            Oppressed nature sleeps.              --Shak.

   8. Natural affection or reverence.

            Have we not seen The murdering son ascend his
            parent's bed, Through violated nature foce his way?
                                                  --Pope.

   9. Constitution or quality of mind or character.

            A born devil, on whose nature Nurture can never
            stick.                                --Shak.

            That reverence which is due to a superior nature.
                                                  --Addison.

   {Good nature}, {Ill nature}. see under {Good} and {Ill}.

   {In a state of nature}.
      (a) Naked as when born; nude.
      (b) In a condition of sin; unregenerate.
      (c) Untamed; uncvilized.

   {Nature printng}, a process of printing from metallic or
      other plates which have received an impression, as by
      heavy pressure, of an object such as a leaf, lace, or the
      like.

   {Nature worship}, the worship of the personified powers of
      nature.

   {To pay the debt of nature}, to die.

Source : WordNet®

nature worship
     n : a system of religion that deifies and worships natural
         forces and phenomena