Definition of "into" [in•to]

• To the inside or interior of: went into the house. (preposition)
• To the activity or occupation of: recent college graduates who go into banking. (preposition)
• To the condition, state, or form of: dishes breaking into pieces; changed into a butterfly. (preposition)
• So as to be in or be included in: parties entering into an agreement; wrote a new character into the play. (preposition)
• Informal Interested in or involved with: They are into vegetarianism. (preposition)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I was panting from the exertion, the call was really more a strained grunting series of messages as we all but ran down the slope……..into the gun smoke…possibly into Hell!"
• "They walk *into* the building they want to break into?"
• "But he sent Robert there often, into that beautiful summer afternoon when Hank Bauer had leaped so high from the green diamond -- and the ball had _smacked _into his leather glove -- and the crowds went wild!"