Un-Defined

Its just one big question.
Thats yet to be solved.
Nobody really bothers to figure it out.
They wont take the chance to get involved.

Day after day, I search for the answer.
But there are too many meanings for one simple word.
How can there not be a set definition
For a word so commonly used and heard.

A four letter noun
Can mean many possible things.
Nobody has stoped to think
What obstacles "life" may bring.