(a.) Abounding in platitudes; of the nature of platitudes; uttering platitudes.

aphoristic axiomatic back-number banal bewhiskered bromidic common commonly known commonplace corny crisp current cut-and-dried epigrammatic fade familiar formulaic formulistic fusty gnomic hackney hackneyed household moth-eaten musty notorious old hat overworked pithy pointed proverbial public pungent sententious set square stale stereotyped stock succinct talked-about talked-of terse threadbare timeworn trite truistic universally admitted universally recognized unoriginal warmed-over well-kenned well-known well-recognized well-understood well-worn widely known worn worn thin