into

American Heritage® Dictionary of the English Language, Fourth Edition

1. prep. To the inside or interior of: went into the house.
2. prep. To the activity or occupation of: recent college graduates who go into banking.
3. prep. To the condition, state, or form of: dishes breaking into pieces; changed into a butterfly.
4. prep. So as to be in or be included in: parties entering into an agreement; wrote a new character into the play.
5. prep. Informal Interested in or involved with: They are into vegetarianism.
6. prep. To a point within the limits of a period of time or extent of space: well into the week.
7. prep. In the direction of; toward: looked into the distance; pointed into the sky.
8. prep. Against: crashed into a tree.
9. prep. As a divisor of: The number 3 goes into 9 three times.

Century Dictionary and Cyclopedia

1. In and to; to and in: implying motion: used to express any relation, as of presence, situation, inclusion, etc., that is expressed by in, accompanied by the idea of motion or direction inward. Compare in. Of motion or direction inward: after such verbs as go, come, run, fly, flee, fall, bring, lead, throw, put, look, show, etc.
2. Of change of condition: after such verbs as pass, fall, grow, change, convert, transmute, etc. Into, as thus indicating change, may when used with an intransitive verb give it a transitive force: as, to talk a man into submission; to reason one's self into error.
3. In: not implying motion: as, he fought into the Revolution.
4. Unto; until. Compare intil.
5. Within, implying deficiency: as, the pole was long enough into a foot.

Wiktionary

1. prep. Going inside (of)
2. prep. Going to a geographic region.
3. prep. Against, especially with force or violence.
4. prep. Producing, becoming
5. prep. Of (when describing duration)
6. prep. colloquial Intensely interested in or attracted to.
7. prep. mathematics Taking distinct arguments to distinct values.
8. prep. mathematics The operation of division, with the denominator expressed first.
9. prep. Investigation of a subject.

GNU Webster's 1913

1. prep. To the inside of; within. It is used in a variety of applications.
2. prep. Expressing entrance, or a passing from the outside of a thing to its interior parts; -- following verbs expressing motion
3. prep. Expressing penetration beyond the outside or surface, or access to the inside, or contents
4. prep. Indicating insertion.
5. prep. Denoting inclusion.
6. prep. Indicating the passing of a thing from one form, condition, or state to another