Ma'anar ƙamus na kalmar "Mulkin Thailand" yana nufin wata ƙasa da ke kudu maso gabashin Asiya da aka sani a hukumance da Masarautar Thailand. Hakanan ana kiranta da sunan Thailand. “Mulki” na nufin kasar da ke karkashin wani sarki ko sarki, yayin da “Thailand” ita ce sunan kasar kanta. Kalmar "Mulkin Tailandia" tana nuna tsarin tsarin mulki na tsarin mulkin kasar Thailand, inda sarki ke zama shugaban kasa, kuma kasar tana karkashin tsarin mulki.