Myriad comes from the Greek myrioi, the word for ten thousand, or less specifically, a countless amount. Myriad can be a noun, like a myriad of choices, or an adjective, like when you study myriad subjects in college. The meaning of MYRIAD is a very large number. How to use myriad in a sentence. Did you know? Is myriad a noun?: Usage Guide Master the word "MYRIAD" in English: definitions, translations, synonyms, pronunciations, examples, and grammar insights - all in one complete resource. Discover the meaning of 'myriad', explore its usage in everyday language, popular idioms, and fun facts that make this word fascinating. Perfect for learners and curious minds!