A device, typically metal, attached to a door and used for knocking to attract attention.
She used the brass knockers to announce her arrival at the old mansion.
Slang term for a woman's breasts.
He made an inappropriate comment about her knockers, which was not well received.
Informal: a person who habitually criticizes or expresses pessimism; a detractor.
The knockers said the project would fail, but it turned out to be a great success.
(Folklore, usually plural) In Cornish and Devon mining folklore, a small subterranean sprite believed to make knocking sounds and guide—or mislead—miners.
The superstitious miners left a crust of pasty to appease the knockers before going underground.