Question

What is enjambment?

Answer 1

Breaking a phrase in poetry into two lines, or punctuation that forces a stop in the middle of a line of poetry.

Answer 2

That's the general idea.

If you'd like a formal definition, some examples, and commentary on the use of this technique, you might check out the following links --

http://www.poetryarchive.org/poetryarchive/glossaryItem.do?id=8102

http://ellie-walker.suite101.com/enjambment-effects-in-poetry-a356716

http://highered.mcgraw-hill.com/sites/0072405228/student_view0/poetic_glossary.html

http://www.poetryfoundation.org/learning/glossary-term/Enjambment