A remover is a stuff — a liquid, a cream, a spray — that takes a mark or a layer off something else. Paint remover eats old paint. Stain remover goes after a spot on a shirt. Nail-polish remover takes colour off nails.

In shops the word almost always sits next to another word: paint remover, stain remover. That first word tells you what it attacks. By itself, remover can also sound like a person (someone who takes furniture away), so everyday English usually keeps the extra word on. The chemistry meaning is the one on bottles.

It is a practical, slightly chemical word. You meet it in hardware shops and bathrooms, not in poems.