myriad |ˈmirēəd| poetic/literarynoun1 a countless or extremely great number : networks connecting a myriad of computers.2 (chiefly in classical history) a unit of ten thousand.adjectivecountless or extremely great in number : the myriad lights of the city.• having countless or very many elements or aspects : the myriad political scene.ORIGIN mid 16th cent. (sense 2 of the noun) : via late Latin from Greek murias, muriad-, from murioi ‘10,000.’USAGE Myriad is derived from a Greek noun and adjective meaning ‘ten thousand’. It was first used in English as a noun in reference to a great but indefinite number. The adjectival sense of ‘countless, innumerable’ appeared much later. In modern English, use of myriad as a noun and adjective are equally standard and correct, despite the fact that some traditionalists consider the adjective as the only acceptable use of the word.