D defs.my
Entry 3 senses Webster, 1913

Caveat

/kāv'-ē-ătˌ/ · Ca·ve·at · IPA /ˈkæviɑt/
01 n. 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 …
  1. 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.(Law)
  2. 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.(U. S. Patent Laws)
  3. 3.
    Intimation of caution; warning; protest.
    “We think it right to enter our caveat against a conclusion.” — Jeffrey.
Phrases & compounds
Caveat emptor — let the purchaser beware, i. e., let him examine the article he is buying, and act on his own judgment.