PLAIN-LANGUAGE DEFINITION
Resolution
Resolution describes the pixel dimensions of an image or video frame.
IN PRACTICE
An example
A 1080 by 1920 frame contains 2,073,600 pixels.
What this does not tell you
More pixels do not automatically mean more genuine source detail.
Use the term precisely
When you use this term in a brief or report, include the relevant source, scope and assumptions. An example explains the concept; it is not a benchmark or a promise of results.