Entry 1 sense Webster, 1913 carsick /(kär"sĭk`)/ · car·sick · IPA /ˈkɑɹˌsɪk/ 01 adj. feeling nauseous due to the movement of a car or other land vehicle; -- similar to airsick and seasick. 1. feeling nauseous due to the movement of a car or other land vehicle; -- similar to airsick and seasick. See: airsick, seasick