sealed letters

Unopened written messages

Sealed letters are letters enclosed in envelopes that have been closed and secured, typically with adhesive, wax, or another fastening method.

Historically, the sealed letter carried legal and social weight—opening another person's sealed correspondence was a serious breach of privacy and often a crime.

The term distinguishes from postcards or open documents: Sealed letters were charged a higher postage rate than unsealed circulars.

Related

parchment · confidential · top secret · secret · dispatch · postmark · addressed · return to sender · folded · ink · missive · courier · mailbox · opened · private · unread · recipient · sender

Opposites
openness/accessibility

sealed letterspostcards

Mailable souvenir notes

open letters · published letters · public notices · circulars · bulletins

privacy/openness

sealed lettersopen letters

Published appeals to all

public announcements · letters to the editor

Family

sealed, letters, seal, seals, sealing, sealer, sealant, unseal, unsealed

Familiarity
Top 500,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G