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
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.
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.
3. Indicating insertion; as, to infuse more spirit or
animation into a composition.
4. Denoting inclusion; as, put these ideas into other words.
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.
Note: Compare In.