Resolution can have many meanings.
A resolution can be a plan, a statement of intent: I will give up smoking on New Year's Day is an example for a resolution.
A resolution can be an agreed solution, the result of negotiations: The resolution of this conflict involves the purchase of....
A resolution can be a measure for maximum precision: my bathroom scale has a resolution of 1kg.
Resolution is used to describe the number of pixels on a computer screen, usually quoted as width × height, with the units in pixels: for example, "1024x768" means the width is 1024 pixels and the height is 768 pixels.
Many other meanings of resolution will exist in specialist areas such as Finance or Law.