D defs.my
Entry 1 sense Webster, 1913

Regimentals

/(-talz)/ · Reg·i·men·tals · IPA
01 n. pl. The uniform worn by the officers and soldiers of a regiment; military dress; -- formerly used in the singular in the same sense.
  1. 1.
    The uniform worn by the officers and soldiers of a regiment; military dress; -- formerly used in the singular in the same sense.(Mil.)