Definition of magnitudinous in English:
magnitudinous
adjective ˌmaɡnɪˈtjuːdɪnəsˌmaɡnɪˈtʃuːdɪnəs
Characterized by magnitude; great, significant, imposing.
Origin
Late 18th century. From classical Latin magnitūdin-, magnitūdō greatness + -ous, probably after multitudinous.