caveat

caveat is a Noun

Definition:

[1] A notice given by an interested party to some officer not to do a certain act until the party is heard in opposition; as, a caveat entered in a probate court to stop the proving of a will or the taking out of letters of administration, etc. Bouvier.

[2] A description of some invention, designed to be patented, lodged in the patent office before the patent right is applied for, and operating as a bar to the issue of letters patent to any other person, respecting the same invention.

[3] Intimation of caution; warning; protest. We think it right to enter our caveat against a conclusion. Jeffrey. Caveat emptor Etym: [L.] (Law), let the purchaser beware, i. e., let him examine the article he is buying, and act on his own judgment.