An album or single featuring original music production, typically electronic music pieces where a music producer is the primary contributing artist.

Not for publication. / Unofficial.

unofficial / secret

unofficially / secretly, in secret

The fastest time ever set for one lap around a particular racetrack or in a particular race.

(often plural) A ranking of music (songs, albums etc) according to popularity during a given period of time.

Used other than figuratively or idiomatically: see track, record.

The collective record of biological development that is reflected in the fossilized remains of organisms through geological history. / The record of preserved evidence for a single species or taxon.

plural of fossil record

(computing, Internet) The SIP or SIPS URI that points to a domain with a location service that can map the URI to another URI where the user might be available, frequently thought of as the "public address" of the user.