SONNETS are deep and meaningful

Definition:

A type of poem that uses 14 lines with a rhyme scheme to express a complete thought, idea, or an opinion.

Example:

Talking to myself there
Someone had overheard.
I was lost for a word.
There was nothing to share.
Embarrassed I was there.
Left awkward and absurd .
A broken wingless bird.
With nowhere to fly there.
Caught red faced there was I.
Didn't want to be seen.
I just wanted to die.
I just wanted to scream.
I'm so terribly shy.
Lost for words it would seem. 

That is an example from Red Blushed and All Cut Up by Paul McCann, it consists of 14 lines with a rhyme scheme and is expressing feelings.