D defs.my
Entry 2 senses Webster, 1913

Platitude

/plăt'-ĭt-o͞odˌ/ · Plat·i·tude · IPA /ˈplætɪˌt(j)ud/
01 n. The quality or state of being flat, thin, or insipid; flat commonness; triteness; staleness of ideas of language.
  1. 1.
    The quality or state of being flat, thin, or insipid; flat commonness; triteness; staleness of ideas of language.
    “To hammer one golden grain of wit into a sheet of infinite platitude.” Motley.
  2. 2.
    A thought or remark which is flat, dull, trite, or weak; a truism; a commonplace.