Romney is just barely hanging on by the thinnest thread that exists.
I reject angrily authority that exists without my respect.
Louisiana State University exists first and foremost to educate Louisianans at a reasonable price.
c.1600, from French exister (17c.), from Latin existere/exsistere "to step out, stand forth, emerge, appear; exist, be" (see existence). "The late appearance of the word is remarkable" [OED]. Related: Existed; existing.