Define: vague

When working with contracts and other legal papers, this is one of the many terms that I usually hear from my boss. So what's the meaning of "vague"

1. not clearly or explicitly stated or expressed: vague promises.
2. indefinite or indistinct in nature or character, as ideas or feelings: a vague premonition of disaster.
3. not clear or distinct to the sight or any other sense; perceptible or recognizable only in an indefinite way: vague shapes in the dark; vague murmurs behind a door.

Source: dictionary.reference.com