User blog:MilkyWay90/Can somebody give me a definition for all ordinals above veblen(omega, 0)

Most blog posts here deal with ordinals, but I only know up to \(\varphi(\omega, 0)\).

Can somebody here give a definition for all ordinals higher than that (last time I asked, somebody gave a link to the article. I do not understand it, but I could not ask question as there are no comments for articles)