- Nebulous is defined as something that has to do with a cloud of gas or dust in space.
An example of nebulous is a star cluster.
- The definition of nebulous is someone or something that is vague or unclear.
An example of nebulous is a plan that doesn't describe the intended outcome.
This star cluster is an example of something that is nebulous.
- of or like a nebula or nebulae
- Rare cloudy; misty
- unclear; vague; indefinite
Origin of nebulousMiddle English nebulus ; from Classical Latin nebulosus
- Cloudy, misty, or hazy.
- Lacking definite form or limits; vague: nebulous assurances of future cooperation.
- Of, relating to, or characteristic of a nebula.
Origin of nebulousMiddle English, from Latin nebulōsus, from nebula, cloud; see nebh- in Indo-European roots.
(comparative more nebulous, superlative most nebulous)
From Middle English, from Latin nebulōsus (“full of mist, foggy, cloudy”), from nebula (“mist, vapour, cloud”), from Proto-Indo-European *nébʰos (“cloud, vapor, fog, moist, sky”). Cognate with Ancient Greek νέφος (néphos, “cloud”), Old High German nebul (“cloud, fog”) (German Nebel), Old English nifol, neowol (“dark, gloomy, obscure, precipitous, prone”). More at neveling, nuel.