lightest
adj. B1 Intermediate US //ˈɫaɪtəst// UK //lˈaɪtəst// light·est
adj. the form of the word 'light' that describes the thing with the least weight. You use it to compare three or more things and pick the one that is the easiest to lift.
adj. the superlative form of 'light', indicating the least weight or the smallest amount of something. It is the comparative form of 'lightest' when used to describe the most minimal degree of a quality.
This is the lightest bag I have ever seen.
The lightest runner in the race finished first, showing how much weight can affect speed.
Among the various materials tested for the new aircraft, the lightest composite proved to be the most effective at reducing fuel consumption without sacrificing structural integrity.