[ ɪ'kwɛstrɪən , ɛ- ]
■ adjective
1》 relating to horse riding.
2》 depicting or representing a person on horseback.
■ noun ( fem. equestrienne ɪˌkwɛstrɪ'ɛn ) a person on horseback.
Origin
C17: from L. equester 'belonging to a horseman' (from eques 'horseman, knight', from equus 'horse') + -ian .