연마 [硏磨·鍊磨·練磨]1 『機』 grinding; abrasion; polishing. ~하다 grind; polish; whet.2 [학문·정신 등을 갈고 닦음]. training; drilling; practice; cultivation; improvement. ~하다 study hard; apply oneself to the study ; train; drill; practice; cultivat+모두 보이기...e; improve. 승마술을 ~하다 practice the art of riding. 젊은이의 심신을 ~하다 train the mind and bodies of young people.▷ 연마기 a grinder; an abrader; a polisher(렌즈 등의).▷ 연마분 polishing powder.▷ 연마재 an abradant; <집합적> abrasives.▷ 연마지 sand paper; emery paper; glass paper.