aérogramme

US: (âr′ə gram′)

WordReference Random House Unabridged Dictionary of American English © 2026

aér•o•gramme  (âr′ə gram′), n. 

1. Stamps a sheet of lightweight paper, bearing an official postal stamp imprint, that is folded to form its own envelope and can be sent via airmail at a special, low rate because of its standard size, light weight, and lack of enclosures.

Also, aerogram, aer′o•gramme′. Cf. air letter. 

• French; see aero-, -gram¹
• 1895–1900

WordReference Random House Unabridged Dictionary of American English © 2026

aer•o•gram  (âr′ə gram′), n. 

1. Telecommunications a radiogram.
2. Stamps, Slang Terms [Older Use.] a message carried by aircraft;
   an airmail letter.
3. Meteorology
   • a diagram for analyzing thermodynamic processes in the atmosphere.
   • the record of an aerograph.
4. Stamps aérogramme.

• aero- + -gram¹ 1895–1900

Collins Concise English Dictionary © HarperCollins Publishers::

aerogram, aerogramme / ˈɛərəˌɡræm/ noun

1. Also called: air letter an airmail letter written on a single sheet of lightweight paper that folds and is sealed to form an envelope