| 
 | 
Definition of First day cover
1. Noun. (philately) a letter or card with new stamp, posted on the day that the stamp was first issued. ¹
¹ Source: wiktionary.com
| 
 | 
1. Noun. (philately) a letter or card with new stamp, posted on the day that the stamp was first issued. ¹
¹ Source: wiktionary.com