n. In law, a notice filed or noted in a public office to prevent some proceeding being had except after warning to the caveator, or person making the caveat: as, a caveat filed with the probate court against the probate of a will.n. Figuratively, intimation of caution; warning; admonition; hint.To enter a caveat.In fencing, to shift the sword from one side of an adversary's sword to the other.