A dress shirt, button shirt, button-front, button-front shirt, or button-up shirt is a garment with a collar and a full-length opening at the front, which is fastened using buttons or shirt studs.

What is meant by a button down shirt?

(Entry 1 of 2) 1a of a collar : having the ends fastened to the garment with buttons. b of a shirt. (1) : having a button-down collar. (2) : having buttons from the collar to the waist.

What is button down collar?

Button-down collars, or "sport collars" have points fastened down by buttons on the front of the shirt. Introduced by Brooks Brothers in 1896, they were patterned after the shirts of polo players and were used exclusively on sports shirts until the 1950s in America.