Perhaps some example usage from graphics papers might be helpful - it basically refers to computing a 'pixel' value potentially from multiple fragments...
RealityEngine Graphics (Akeley. 1993)
Thus the image is complete as soon as the last primitive
has been rendered; there is no need for a final framebuffer operation
to resolve the multiple color samples at each pixel location to a
single displayable color.
Hardware Accelerated Rendering Of Antialiasing Using A Modified A-buffer Algorithm. (Winner et al, 1997)
Pixels which are completely covered by opaque objects are resolved
in a single pass.
Otherwise multiple passes are required to resolve the final color
for each pixel in the scene.
A Directionally Adaptive Edge Anti-Aliasing Filter. (Iourcha et al, 2009)
Downsampling is performed by a resolve, which is the aggregation of the samples with filtering.