Someone or something that closes.
"The closer approached the fence, its metal jaws ready to crush anything in its path."
In plain English: A closer is someone who finishes a deal or gets a sale after other people have done most of the work.
"The closer was waiting at the gate to collect the mail."
Usage: Use "closer" to describe a person or device specifically designed to shut or seal something, such as a door closer or a salesperson who brings customers in. Avoid using it simply as an adjective for things that are physically near unless you mean they are approaching the finish line.
comparative form of close: more close
"The final chapter feels closer to my heart than any other part of the book."
In plain English: Closer means nearer to something or someone than before.
"She is a closer friend than anyone else I know."
Usage: Do not use "closer" as an adjective to mean "more intimate" or "deeper," because it is grammatically incorrect in this way. Instead, use only the comparative adverb "closer" when describing something that is physically nearer in distance. For example, say "stand closer to me" rather than "a closer friend."
The word closer comes from Middle English, where it was formed by adding the suffix "-er" to the verb close. This construction created a new term meaning one who performs the action of closing something.