OK, to be picky then...
From the dictionary(dot)com website...
Some definitions of the word vacuum
a. Absence of matter.
b. A space empty of matter.
c. A space relatively empty of matter.
d. A space in which the pressure is significantly lower than atmospheric pressure.
Definitions "c" and "d" are the ones I used. Anyone can tell you that an absolutely pure vacuum as defined by "a" and "b" does not really exist, nor can it be created on earth.
BTW, I happen to BE a physics type person.