NEBULOUS

vague, cloudy

lacking clearly defined form

lacking definite form or limits
SYN - cloudy
"nebulous distinction beteen pride and conceit"

lacking definition or definite content
SYN - unfixed
ANT - distinct
"nebulous reasons"

"In this base form of existence without the brainwashing and strictures of civilization the distinction between what was good and what was evil was nebulous."

"Where one of the philosophers started and the other ended was rather nebulous."

"It was hard for her parents to justify giving her more money for school when she had such nebulous goals."