Definition of Timeform in US English:

Timeform

(also TIMEFORM)

noun

Horse racing
  • Attributive Designating a numerical rating given to racehorses based on past performance by the periodical Timeform; relating to such ratings. Frequently in "Timeform rating". [Timeform is a trademark.]

Origin

1940s; earliest use found in Timeform. From Timeform, the name of a weekly British publication (first published in 1948) which details the performance of racehorses, and of the system which it uses to rate this from time + form.

Pronunciation

Timeform

/ˈtʌɪmfɔːm/