Simple Definition of nebulous
: not clear : difficult to see, understand, describe, etc.
Examples of nebulous
These philosophical concepts can be nebulous.
<made nebulous references to some major changes the future may hold>
Origin of nebulous
Latin nebulosus misty, from nebula
First Known Use: 1674
NEBULOUS Defined for Kids
Seen and Heard
What made you want to look up nebulous? Please tell us where you read or heard it (including the quote, if possible).