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Webster 1913 Edition

Adj.

Unfashionable.

[Obs.]

Beau. & Fl.

Adj.

Unfashionable. [Not used.]

infashionable ‎(comparative more infashionable, superlative most infashionable)

Obsolete form of unfashionable.
(Can we find and add a quotation of Beaumont and Fletcher to this entry?)