Promulgated means "published," or "formally made public." If you wrote an opinion piece for your local paper, your ideas were promulgated there.
Promulgated comes from the Latin word promulgare, which means "to make publicly known." Laws are promulgated when they come into effect by formal proclamation. But these days you'll usually hear about ideas being promulgated — it's a fancier way of saying they were promoted or shared with a lot of other people. So every thought or opinion you post to your blog? It's been promulgated.
