The Collaborative International Dictionary
bettering
bettering \bettering\ adj. changing for the better; -- antonym of worsening. [Narrower terms: ameliorating(prenominal), ameliorative, amelioratory, meliorative]
Wiktionary
bettering
vb. (present participle of better English)
WordNet
bettering
adj. changing for the better [ant: worsening]
Usage examples of "bettering".
He was about thirty when, having taken service for a year in the household of Ploron, head forester to the Ban of Sarkid, he met his daughter Keremnis at the spring festival and, without the least thought of bettering himself but simply in the course of his own pleasure, got her with child.
My grannie is always after my father for being in trade instead of bettering himself.