mor·i·bund adj \'mo?r-?-(?)b?nd, 'mär-\ Definition of MORIBUND 1: being in the state of dying : approaching death 2: being in a state of inactivity or obsolescence — mor·i·bun·di·ty \?mo?r-?-'b?n-d?-te, ?mär-\ noun See moribund defined for English-language learners » Examples of MORIBUND an actor who is trying to revive his moribund career The peace talks are moribund.