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

Type of: mail

• lobbyist
• lobe
• lobe of the lung
• lobe-finned fish
• lobectomy
• lobed
• lobed leaf
• lobed spleenwort
• lobefin
• lobelia
• Lobelia cardinalis
• Lobelia dortmanna
• lobelia family
• Lobelia inflata
• Lobelia siphilitica
• Lobeliaceae
• lobeliaceous
• Lobipes
• Lobipes lobatus
• Lobito
• loblolly
• loblolly pine
• lobo
• Lobotes
• Lobotes pacificus