nebulous

Adjective
  1. Lacking definite form or limits (synset 300785533)
    "gropes among cloudy issues toward a feeble conclusion"; "nebulous distinction between pride and conceit"
    similar to: indistinct - not clearly defined or easy to perceive or understand
    same as: cloudy, nebulose
  2. Of or relating to or resembling a nebula (synset 303100835)
    "the nebular hypothesis of the origin of the solar system"
    referred to in: astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole
    same as: nebular
  3. Lacking definition or definite content (synset 300705690)
    "nebulous reasons"; "unfixed as were her general notions of what men ought to be"
    similar to: indefinite - vague or not clearly defined or stated
    same as: unfixed

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