[rawgabbit]

With semantics, I believe there are three types of definitions: descriptive, classification schemes, and functional requirements.

Descriptive: It looks like a water tank carrier. No, it looks like a tractor.

Nomenclature and classification: In the interwar period, the British built infantry tanks like the Matilda and cruiser tanks like the Cruiser I.

Functional: Tanker tactics, after much experimentation, coalesced into two categories. Heavy tanks for shock action to break through enemy lines. Lighter tanks operating in a wolf pack formation would exploit the break through and destroy rear depots and cut off the enemy's lines of communication.