1. multifarious, multitudinous, myriad; divers, sundry, various. Many, innumerable, manifold, numerous imply the presence or succession of a large number of units. Many is a popular and common word for this idea: many times. Numerous, a more formal word, refers to a great number or to very many units: letters too numerous to mention. Innumerable denotes a number that is beyond count or, more loosely, that is extremely difficult to count: the innumerable stars in the sky. Manifold implies not only that the number is large but also that there is variety or complexity.