Mary-marry-merry merger UK /ˈmɛəɹi ˈmæɹi ˈmɛɹi ˌmɜːd͡ʒə/US /ˈmeɹi ˈmæɹi ˈmɛɹi ˌmɝd͡ʒɚ/ noun1 •A phonemic merger where the vowels in "mare", "pat", "pet" (usually pronounced mâr, păt, pĕt respectively) are pronounced the same before r, making "Mary", "marry", "merry" homophones.