Definition of "white-letter" [white-letter]

• See the extract. (noun)

The Century Dictionary (Public Domain)

• "Every now and then -- white-letter days -- there would drop on them a long evening together."
• "Business disposed of, he threw aside all restraint, and for hours his speculations and theories upon philosophy, government, education, eloquence; his criticism of books, his reminiscences of men and events, made that one of the white-letter days of my life."
• "Special exterior colors such as red, blue, green, black pearl; 16-inch wheels, white-letter (OWL) radials, wheel flares, bodyside moldings, deep tinted glass, skid plates and tow hooks."