▪ a particular type of illness or disease: "botulism causes fodder sickness of horses"
2. the feeling or fact of being affected with nausea or vomiting:"she felt a wave of sickness wash over her"Similarnauseabiliousnessqueasinessvomitingretchinggaggingupset stomachstomach upsettravel-sicknessseasicknesscarsicknessairsicknessmotion sicknessmorning sicknessaltitude sicknessinformal:throwing uppukingrare:qualms
Word OriginOld Englishsēocnesse (see sick1, -ness).