Of course. Whatsa matter you? Seriously, our, human, experience of “matter” is mostly about electrons. Our experience that a wall is solid is all about the electron clouds around atoms repelling each other. read more
The electron packs a huge punch given how little space it occupies. I would go so far as to say it is the only “matter” we directly experience. Our other direct experiences, heat and light, are “energy”. All the other answers are right. There are many other forms of matter. read more
In discussions of matter and antimatter, normal matter has been referred to by Alfvén as koinomatter (Gk. common matter). It is fair to say that in physics, there is no broad consensus as to a general definition of matter, and the term "matter" usually is used in conjunction with a specifying modifier. read more
Even in electron–positron annihilation, there is no net matter being destroyed, because there was zero net matter (zero total lepton number and baryon number) to begin with before the annihilation—one lepton minus one antilepton equals zero net lepton number—and this net amount matter does not change as it simply remains zero after the annihilation. read more