(law) a formal notice filed with a court or officer to suspend a proceeding until filer is given a hearing
"a caveat filed against the probate of a will"
A warning.
"Before signing the contract, I added a caveat that any changes to the deadline would require my written approval."
To qualify a statement with a caveat or proviso.
"I'd love to join the hiking trip, but I have a major caveat regarding my knee condition."