To me, measurements or dimensions means the sizes and distances and positions of things (in units like mm or inches), as typically found in the package drawing in a datasheet.
To me, in the context of EDA software (which this is) the “footprint” means the complete digital representation, in the EDA program, of the PCB features (pads, holes, etc) needed to mount the part.
One would use the measurements/dimensions/datasheet drawing to create the footprint in the EDA software.
The footprint is linked to the component’s schematic symbol so the software knows which signal goes to which physical pin.
My frustration with your (plural) replies is indeed because you both seem to be very, very, very sloppy with your terminology (and happy to be sloppy). Many terms actually are specific, which is why it’s confusing to others when you use them in a nonstandard way. (I worked for years as a technical writer, and one key thing in technical writing is to use terminology consistently and precisely. That means not using multiple terms to refer to the same thing, and not using the same term to refer to multiple things. This discussion is a textbook example of why this is a cardinal rule in technical writing.)