[1] : The Collaborative International Dictionary of English v.0.48

into \in"to\, prep. in + to.
   to the inside of; within. it is used in a variety of
   applications.
   1913 webster

   1. expressing entrance, or a passing from the outside of a
      thing to its interior parts; -- following verbs expressing
      motion; as, come into the house; go into the church; one
      stream falls or runs into another; water enters into the
      fine vessels of plants.
      1913 webster

   2. expressing penetration beyond the outside or surface, or
      access to the inside, or contents; as, to look into a
      letter or book; to look into an apartment.
      1913 webster

   3. indicating insertion; as, to infuse more spirit or
      animation into a composition.
      1913 webster

   4. denoting inclusion; as, put these ideas into other words.
      1913 webster

   5. indicating the passing of a thing from one form,
      condition, or state to another; as, compound substances
      may be resolved into others which are more simple; ice is
      convertible into water, and water into vapor; men are more
      easily drawn than forced into compliance; we may reduce
      many distinct substances into one mass; men are led by
      evidence into belief of truth, and are often enticed into
      the commission of crimes; she burst into tears; children
      are sometimes frightened into fits; all persons are liable
      to be seduced into error and folly.
      1913 webster

   note: compare in.
         1913 webster
see also:
in 

Into >> I Words
Into, definition of term: Into
into_pag1.html

Go Into >> G Words
Go Into, definition of term: Go Into
go+into_pag1.html

Get Into >> G Words
Get Into, definition of term: Get Into
get+into_pag1.html

Fall Into >> F Words
Fall Into, definition of term: Fall Into
fall+into_pag1.html

Buy Into >> B Words
Buy Into, definition of term: Buy Into
buy+into_pag1.html

Come Into >> C Words
Come Into, definition of term: Come Into
come+into_pag1.html

Come Into Being >> C Words
Come Into Being, definition of term: Come Into Being
come+into+being_pag1.html