The IAU has, in relatively recent years, been fiddling with the definitions of what objects such as planets are. Quite aside from disrupting everyone's general understanding for no good reason whatsoever, they did this very poorly.
Here's a set of criteria for defining a body as a planet:
A Planet...pluto.jpg
That may not be a perfect set of criteria, but I submit that it is at least close. Also much closer than the IAU's profound lapse of judgement.
ceres.jpg
So yes: Pluto is (still) a planet. We could, if we were being really anal, quibble about it being number nine; There's Ceres, a 950 km diameter planet located in the asteroid belt, between Mars and Jupiter, for instance (at the left) which makes Pluto (at least) planet ten as counted outwards from our star; but Pluto is definitely a planet.
Unlike, for instance, Vesta (below), which is just as clearly an isolated fragment of something larger:
vesta.jpg
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