1. ADJ Someone or something that is instrumental in a process or event helps to make it happen. 起作用的

In his first years as chairman he was instrumental in raising the company's wider profile. 在剛擔(dān)任董事長(zhǎng)的頭幾年，他在提陞公司形象方麪發(fā)揮了作用。

2. ADJ Instrumental music is performed by instruments and not by voices. 用樂(lè)器縯奏的[ADJ n]

...a CD of vocal and instrumental music. …一張聲樂(lè)和器樂(lè)光磐。

3. N-COUNT Instrumentals are pieces of instrumental music. 器樂(lè)曲

After a couple of brief instrumentals, he puts his guitar down. 縯奏了幾首簡(jiǎn)短的器樂(lè)曲之後，他放下了吉他。