cleaner/'kliːnər $ -nər/

n.

➊ a person whose job is to clean houses, offices, public places, etc.

➋ a substance or device used for cleaning things

n.

➊ [C] 清洁工：an office cleaner 办公室清洁工

➋ [C; U] 清洁剂；清洁器：a vacuum cleaner 真空吸尘器

◇a bottle of floor cleaner 一瓶地板清洁剂

构词clean + -er

用法cleaner还可以看作是形容词clean的比较级。