1. affected with nausea; inclined to vomit: "a rancid, cloying odor that made him nauseous"Similarsicknauseatedqueasybilioussick to one's stomachgreengreen around the gillsillunwellbadseasickcarsickairsicktravel-sickinformal:about to throw upbarfychunderousrare:qualmish
2. causing nausea; offensive to the taste or smell: "the smell was nauseous"