first-day cover

[ furst-dey, -dey ]
/ ˈfɜrstˌdeɪ, -ˈdeɪ /

noun Philately.

a cover marked so as to indicate that it was mailed on the first day of issue of the stamp it bears and from one of the cities at which the stamp was issued on that day.

Origin of first-day cover

First recorded in 1935–40

Words nearby first-day cover

first world war, first-born, first-cause argument, first-class, first-come, first-day cover, first-degree, first-degree burn, first-degree murder, first-dollar coverage, first-foot

British Dictionary definitions for first-day cover

first-day cover

noun

philately a cover, usually an envelope, postmarked on the first day of the issue of its stamps