The word 'vague' is an adjective. An example of a sentence using the word is: He's not sure on the exact spot, but he has a vague idea of the area.
"His intentions were very vague."
When I interviewed the prisoner he was a little vague about his movements last night.
She avoided answering my questions and was intentionally vague.
I wish you would not be so vague about your plan: I really need specific details.
It is an adjective. ex: The vague boy went to the store If it was a noun the sentence would not make sense. The vague went to the store.
David made a vague gesture in the direction of the computer and returned to staring gloomily at his coffee.
I am not writing a sentence using that word.
"That desciption is too vague, you need to be more specific."my quiz was vague because of my hand writing
a sentence using the word endotracheal
This is a sentence using the word aviator.
I am saying a sentence using the word collagen.