Ambitiously desirous to equal or even to excel another; eager to emulate or vie with another; desirous of like excellence with another; with of; as, emulous of another's example or virtues
[ 'em-y&-l&s ] (adjective.) 1535. Latin aemulus (“striving to equal or excel, rivaling; in a bad sense, envious, jealous”), akin to imitari (“to imitate”); see imitate.