platitudinal

adjective

Without freshness or appeal because of overuse: banal, bromidic, clichéd, commonplace, corny, hackneyed, musty, overused, overworked, platitudinous, shopworn, stale, stereotyped, stereotypic, stereotypical, threadbare, timeworn, tired, trite, warmed-over, well-worn, worn-out. See excite/bore/interest, usual/unusual.

The adjective has one meaning:

Meaning #1: dull and tiresome but with pretensions of significance or originality
  Synonyms: bromidic, corny, platitudinous