The New York Times invents a word?

From the New York Times:

Ostentious outfits were on display in York, England, for Ladies Day of the Royal Ascot races.

Does the Times mean ostentatious?

Neither the Oxford English Dictionary nor Merriam-Webster OnLine nor dictionary.com has an entry for "ostentious."

[This sentence appears in a photo caption--no way to link to it, alas.]

Update: By 3:23 p.m., the caption was gone, replaced by this one:

Women looked their very best in York, England, for Ladies Day of the Royal Ascot races.