all-terrain vehicle
noun /ˌɔːl təreɪn ˈviːəkl/
/ˌɔːl təreɪn ˈviːəkl/, /ˌɔːl təreɪn ˈviːhɪkl/
(abbreviation ATV)
(especially North American English)- a small open vehicle, usually with one seat and four wheels with very thick tyres, designed especially for use on rough ground without roads