Definition of best-kept in English:

best-kept

adjective

  • 1That is maintained in the best order or condition; most carefully cared for or looked after.

  • 2Of a secret: that is known to very few people. Now used especially with reference to something good or desirable that is not generally known about.

Origin

Late 16th century; earliest use found in Vicary's Profitable Treatise Anatomy. From best + the past participle of keep, after well-kept.

Pronunciation

best-kept

/ˌbɛs(t)ˈkɛpt/