adj. 25B6; adjective
precious works of art : VALUABLE, costly, expensive; invaluable, priceless, beyond price.
her most precious possession : VALUED, cherished, treasured, prized, favourite, dear, dearest, beloved, darling, adored, loved, special.
his precious manners : AFFECTED, over-refined, pretentious; informal la-di-da; Brit. informal poncey.