of only ordinary or moderate quality; neither good nor bad; barely adequate: The car gets only mediocre mileage, but it's fun to drive. Synonyms: undistinguished, commonplace, pedestrian, everyday; run-of-the-mill. Antonyms: extraordinary, superior, uncommon, incomparable.
2.
not satisfactory; poor; inferior: Mediocre construction makes that building dangerous. Synonyms: meager, low-quality, second-rate; so-so. Antonyms: excellent, superior.
Origin: 1580–90; < Middle French < Latin mediocris in a middle state, literally, at middle height = medi(us)mid1 + OL ocris rugged mountain, cognate with Greek ókris, akin to ákros apex; compare Umbrian ocar hill, citadel
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 children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
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.
1580s, from Fr. médiocre, from L. mediocris "of middling height or state," originally "halfway up a mountain," from medius "middle" (see medial) + ocris "jagged mountain" (cf. Gk. okris "peak, point," Welsh ochr "corner, border," L. acer "sharp;" see acrid).