>>211512223
If you mean the Constitution class, it's more like a cruiser in that it's meant to be mid at everything but so over-tuned compared to its contemporaries that translates to being good at everything - it is even capable of atmospheric flight so long as you don't try and land it. If you want a battleship, you stuff more gubbins on it to get something like the Federation class, if you want something lighter and more zippy you hack pieces off to get the Saladin class.
If you mean the Galaxy (the TNG ship), it's a mobile starbase.