定音

to call the tune / to make the final decision

to set / to fix / to determine / to decide / to order

sound / noise / note (of musical scale) / tone / news / syllable / reading (phonetic value of a character)

lit. to fix the tone with a single hammer blow / fig. to make the final decision

timpani

variant of 一錘定音|一锤定音[yi1 chui2 ding4 yin1]