Word Study
first world war |
first-aid kit |
first-aid station |
first-class |
first-class honours degree |
first-class mail
| first-come-first-serve
| first-come-first-served
| first-degree burn
| first-hand
| first-nighter
first-class mail
WORDNET DICTIONARY
Noun first-class mail has 1 sense
- first-class mail(n = noun.communication) 1st class, 1st-class mail, first class - mail that includes letters and postcards and packages sealed against inspection; Array is a kind of mail
has particulars: correspondence
For further exploring for "first-class mail" in Webster Dictionary Online