improve-v; 1 Senses

Sense Number 1: change for the better

John has improved his grades this semester
The weather improved enough for us to go sailing.
This chocolate cake recipe cannot be improved in any way.

VerbNet: other_cos-45.4
FrameNet: Cause_to_make_progress
PropBank: improve.01
WordNet 3.0 Sense Numbers: 1, 2