|Muggles' Guide to Harry Potter - Magic|
|Features||Non-magical person of magical heritage|
|First Appearance||Harry Potter and the Chamber of Secrets|
The opposite of a Muggle-born witch or wizard, a Squib is the child of wizarding parents with no magic powers of his or her own.
Neville Longbottom is initially so unsure of his magical abilities that he is afraid that he is "almost a Squib".
There are rumours that Professor Dumbledore's late sister Ariana was hidden away from Wizarding society because she was a Squib and an embarrassment, rumours that are fanned by Rita Skeeter in her "tell-all" book about Dumbledore, which was published shortly after his death.
Early on, we learn that not all wizards are equally powerful. Quite apart from the obvious specializations – Madam Pomfrey Healing, Madam Hooch with flying and refereeing, and Professor Snape with his Potions, to give a few examples – we gather that there are wizards who overall have stronger or weaker magical abilities. This is explicitly mentioned several times in the case of Neville Longbottom, who repeatedly bemoans his magical weakness. We also learn that it is possible for wizards to spring from Muggle families, and we are presented with Hermione Granger, who has done exactly that. Combining these two, it is clearly possible that a Wizarding family may, on occasion, contain an individual with limited or no magical powers. While Ron touches on the concept briefly, and Neville more strongly, we don't hear the name for the condition until Harry's second year.
Despite their lack of magical ability, Squibs are now regarded as part of the Wizarding world. This is a very uncomfortable place for them, as they are perforce aware of the world of magic but cannot join it. All the same, it is better than the past century, when they were apparently often hidden away as being unfit for either Wizarding or Muggle company.
It is perhaps worth mention that while "Squib" is a term for non-magical people born of magical parents, there is no analogous term for magical children born of Muggle parents (like Hermione, whose parents are both Muggle dentists). The closest term available is "Muggle-born", which seems to be used only as a term of derision, a milder form of "Mudblood".