Used other than figuratively or idiomatically: see doctor, -'s, orders. / (Britain, bingo) The number nine.

(idiomatic) To go extinct or become obsolete; to fall out of common practice or use; to become a thing of the past.

(business, politics) A person employed to gloss over a poor public image (or present it in a better light) in business and politics, especially after unfavourable results have been achieved. A lobbyist; PR person.

(idiomatic, transitive) To generate spin (favourable interpretation or bias).

(physical chemistry) A covalent bond in which two electron pairs (instead of the usual one) are shared between two atoms; most common between carbon atoms and carbon, oxygen or nitrogen atoms, but several other forms are known.

Used other than figuratively or idiomatically: see track, down. / (idiomatic) To hunt for or locate; to search for; to find.

An extra check or verification made a second time, usually with additional caution or attention. / (chess, uncountable) A check delivered by two pieces simultaneously.

To check again; to check with extra caution or attention; to verify or make sure.

Something transposed from a thought to a document; the written account of an idea. / Documentary evidence and sources.

(non-native speakers' English) A documentary.