Caveat

1. n. Intimation of caution; warning; protest.
2. 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 in a probate court to stop the proving of a will or the taking out of letters of administration, etc.
3. n. 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.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.