People with only one vision or less (0).
People that can only see one thing or in most cases lacking vision completely.
A "onevision" therefore steal visions from others in most cases.
A "onevision" can also be called a "novision".
Picture of a "onevision" character:
http://bayimg.com/caPkGAabF
"What a onevision!"
Meaning: what a stiff vision lacking piece of shitmoron,
or:
One of those vision lacking thief's.
Pronounced "1-via". Onevia is a portmanteau combining the words 180sx and Silvia. The car is creating by adding a 180sx front end (pop-up headlights) onto an S13 Silvia.
A 240sx coupe looks like a Onevia. A Onevia is also the opposite of the Sileighty.