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Noun: first-class mail
  1. Mail that includes letters and postcards and packages sealed against inspection
    - first class, 1st class, 1st-class mail

Type of: mail

Encyclopedia: First-class mail

Nearest

first visual area
first water
First World
First World War
first-aid kit
first-aid station
firstborn
first-class
first-class honors degree
first-class honours degree
first-class mail
first-come-first-serve
first-degree burn
first-generation
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firstling
firstly
first-nighter
first-order correlation
first-place finish
first-rate