broadening /ˈbɹɔː.də.nɪŋ/noun 2adjective 1forms 3 noun2 •The act of becoming broader. •The act of making (something) broader.The broadening of the main street in this sleepy town is expected to cost a lot of money; it is said that the project will be financed with municipal bonds, but many citizens are skeptical of such debt.The broadening of one's horizons is good for the soul. adjective1 •That gives someone broader education and experience; that broadens someone's horizons. formsbroadenings · more broadening · most broadening