plentiful; copious; abundant: a plenteous supply of food.
2.
yielding abundantly; fruitful: a plenteous harvest.
Origin: 1250–1300; Middle English plenteus (see plenty, -ous); replacing Middle English plentivous < Old French plentivos, equivalent to plentif abundant (plent(e) plenty + -if-ive) + -os-ous
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a chattering or flighty, light-headed person.
a gadget; dingus; thingumbob.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.