Oxford Dictionary English morning sickness nounnoun BrE BrE//ˈmɔːnɪŋ sɪknəs// ; NAmE NAmE//ˈmɔːrnɪŋ sɪknəs// [uncountable] Pregnancy Add to my wordlistjump to other resultsthe need to vomit that some women feel, often only in the morning, when they are pregnant, especially in the first months Wordfinderpregnantantenatal, child, conception, fetus, maternity leave, miscarriage, morning sickness, pregnant, scan, womb See related entries: PregnancySee morning sickness in the Oxford Advanced American DictionaryCheck pronunciation: morning sickness oxfordlearnersdictionaries.com