It would be if we divide Europe into the East and West plainly. But if you do insist that there is also the Central Europe, then we need to assume there is a point which conditionally have to be taken for the geographical Center of Europe and conclude the Central Europe is anything that lays in significant distance to the West and East from this point. First of all we need to agree where this point is. Some sources claim it is located in Western Ukraine.
In 1887, geographers from the Austro-Hungarian Empire set up a historical marker and a large stone in what is today a part of Ukraine, believed to mark the geographic centre of Europe.
Also we need to agree where is the Western edge of Europe is. If in the East it is defined by the Ural mountains which plainly show it, in the West the Iberian peninsula bulges out far away into Atlantic sea, makes this definition more complicated. But even if we take Lisbon for the marker, as you said, the total distance from Lisbon to Yekaterinburg is approximately 5400 km and if we will divide this distance into three equal parts 1800X1800X1800 km (which stand for Western, Central and Eastern Europe) then Kiev and the largest part of Ukraine will be in Central Europe.
It is certainly culturally, economically, linguistically, gastronomically, religiously and socially Eastern Europe
How is it all relevant? In my understanding "East" and "West" are purely geographical characteristics.