Something that's nebulous is clouded or hazy. When you walk through the woods on a foggy morning, the trees may all have a mysterious, nebulous look to them.

When you fly in a plane on an overcast day, the land below you looks nebulous and indistinct. You can also use nebulous in a more figurative way, to describe vague ideas or fuzzy concepts. Nebulous comes from the Latin nebulosus, "cloudy, misty, or foggy." Its root is nebula, which is "vapor or fog" in Latin and was adopted by astronomers in the 1700s to mean "a cloud of gas and dust in outer space."

Definitions of nebulous

adj lacking definite form or limits

nebulous distinction between pride and conceit”
cloudy, nebulose
not clearly defined or easy to perceive or understand

adj lacking definition or definite content

nebulous reasons”
vague or not clearly defined or stated

adj of or relating to or resembling a nebula


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