"What Is the Difference Between a Truck and a Pickup Truck? Trucks, in its most general form, are large vehicles used to haul or tow, while pickups are utilitarian trucks that come with a bed. A pickup is simply a truck with a separate frame/cab and an open box."
Is an SUV considered a truck?
SUV Meaning: What is an SUV?
Per Cars.com, in the United States and several other countries, the SUV has been classified as a light truck rather than a car. This gives the SUV a more relaxed fuel efficiency standard. In terms of how the SUV looks and feels, it resembles a combination of truck, minivan, and the average American family car.
So it some senses yes a Ridgeline or any SUV for that matter, are trucks.
But when people are referring to trucks and meaning pick-up trucks, a Ridgeline is not a truck.
Most "truck" owners are thinking about pick-up trucks.