(idiomatic) A form of social sanction that consists of ignoring a particular individual, neither speaking to that person nor responding to his or her words.

A telephone number not listed in the directory.

(idiomatic) born rich, or into a wealthy family

An alloy of more than 95.84% silver, and up to 4.16% copper; in use for coin from 1697 to 1720, it was withdrawn because it was too soft.

(geology) Of a geologic period within the Paleozoic era; comprises the Llandovery, Wenlock, Ludlow and Pridoli epochs from about 439 to 409 million years ago.

(geology) The Silurian period.

(idiomatic) to be appointed as a Queen's Counsel (QC) or King's Counsel (KC)

A shiny pale grey colour.

Of a shiny pale grey colour.

An English surname originating as an occupation for a silversmith or a rich man, or for someone having silvery gray hair or living by a silvery brook. / A surname from German.