What is a "truck"?

I have this argument with my wife about my Land Cruiser. I call it a truck (ladder frame, body on frame, solid axles, transfer case, etc) but she insists it isn't because its not a pickup truck.

Probably just semantics, but I sure could use some help with this one, I mean if she wont listen to me, surely she will listen to the internet right? So what do you think qualifies a "truck"? Here is my list

Ladder frame (can be integrated)

Axles meant for heavy load

Spring rates that are meant to carry weight outside of passengers and their cargo

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utility grade hubs, brakes and transmission

Engines and systems meant for Utility (High torque, strengthened over a passenger vehicle engine, increased fluid and heat capacity)

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In short, something that can do a little work.

Have a unimog train for your troubles.