platitudinarian

[plat-i-tood-n-air-ee-uh n, -tyood-]
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noun

a person who frequently or habitually utters platitudes.

Origin of platitudinarian

1850–55; platitudin(ous) + -arian, perhaps on the model of latitudinarian
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for platitudinarian

Historical Examples of platitudinarian