What is a Squib in 'Harry Potter?

Answer 1

A Squib is a person who is born to at least one parent who possesses magical abilities but do not have magical abilities of their own.

There are two mainly known examples of Squibs in the Harry Potter series, these are Argus Filch (the caretaker who works at Hogwarts) and Arabella Figg (a member of the Order of the Phoenix) who lives in Privet Drive near Harry and was asked by Dumbledore to keep an eye on Harry while he was young and was not at Hogwarts.

It is said that although Squibs do not possess any magical abilities such as the ability to use a wand, they are accepted usually into the magical world. Squibs are unable to see Dementors. Mrs Figg, when asked about the presence of Dementors in Little Whinging, lied in order to get Harry off the charges. Squibs normally marry into muggle families and all Muggle-Borns are descended from Squibs

Answer 2

A person born in a wizarding family but isn't a wizard /witch themselves. Some call squibs wizard-born muggles but I disagree.

Filch is an example of a Squib

Answer 3

In the Harry Potter books, a Squib is somebody who is born in a family of wizards but is not a wizard him(her)self.