Stanza

Definition:
A group of lines that looks like a "paragraph" in a poem; a unit. Stanzas are separated by spaces.

Example:
"I want them to waterski
across the surface of a poem
waving at the author's name on the shore.

But all they want to do
is tie the poem to a chair with rope
and torture a confession out of it."
--"Introduction to Poetry" by Billy Collins

Significance:
Stanza in poetry is important because it separates different ideas in a poem, allowing rests when reading and let people think through what they just read. Sometimes stanza help rhymes to stand out more.