大 (dai) = Great/Grand
魔 (ma) = Demon/Magic
While no kanji is used in the title, that's what "Daima" means.
It's set in 魔界 (makai), meaning "Demon World/Realm". It features 魔人 (majin), which refers to supernatural, magical beings like "demon(s)" and "genie(s)". And the working title for the show was "Dragon Ball Magic". That would have been a better title, imo. "Daima" is too weeb.