Meaning

adjective extremely hungry

adjective devouring or craving food in great quantities

originFrom Middle English ravenous, ravynous, from Old French ravineus. By surface analysis, ravin + -ous. As seen at raven and ravin, the word comes from a root referring to predation, not from the root referring to ravens (corvid birds); but folk etymology notes that the latter hypothesis seems plausible because ravens can often seem ravenous (especially as nestlings).

Etymology from Wiktionary, CC BY-SA 3.0