ALL meanings of first-day cover
first-day cover
F f - noun first-day cover 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. 1
- noun first-day cover a cover, usually an envelope, postmarked on the first day of the issue of its stamps 0
- noun first-day cover an envelope, postal card, etc., bearing a newly issued stamp and a postmark for the first day the stamp was issued 0