tuatua, n. 1. Ridge, main range. Tenei aitua nui ka eke nei kei te tuatua tonu o Aotearoa motu e hohoni nei.
2. An outer garment worn by a chief on state occasions.
3. Amphidesma subtriangulatum, a bivalve mollusc. = kahitua, tairaki, taiwhatiwhati, kaitua.
Williams Dictionary