(engineering) Initialism of total acid number, the measure of a lubricant's or crude oil's acidity. / (banking) Initialism of transaction authentication number, in electronic banking.

(dialectal) A twig or small switch.

A surname from Vietnamese.

A Chinese surname from Hokkien.

Alternative form of Dan

A Chinese surname from Mandarin.

(dialect, rare) The second cardinal number two, formerly used in Celtic areas, especially Cumbria and parts of Yorkshire, for counting sheep, and stitches in knitting.

Yellowish-brown. / Having dark skin as a result of exposure to the sun or an artificial process intended to mimic this effect.

A yellowish-brown colour. / A darkening of the skin resulting from exposure to sunlight or similar light sources. / The bark of an oak or other tree from which tannic acid is obtained.

(transitive, intransitive) To change to a tan colour due to exposure to the sun. / (transitive) To change an animal hide into leather by soaking it in tannic acid. To work as a tanner.