air letter(n = noun.communication) aerogram, aerogramme, airmail letter - a letter sent by air mail; Array
is a kind of letter, missive

active air defense, air, air alert, air attache, air attack, air bag, air base, air bed, air bladder, air brake, air brush, air bubble, air built, air castle, air cell, air chamber, air cleaner, air cock, air combat command, air compressor, air condition, air conditioner, air conditioning, air cooling, air corps, air cover, air crew, air current, air cushion, air defense, air division, air drill, air duct, air embolism, air engine, air express, air filter, air flow, air force, air force academy, air force intelligence surveillance and reconnaiss, air force isr, air force officer, air force research laboratory, air force space command, air gap, air gas, air group, air gun, air hammer, air hole, air horn, air hose, air hostess, air jacket, air lane, air level, air line, air lock, air mail, air marshal, air mass, air mattress, air medal, air mile, air national guard, air out, air passage, air pipe, air plant, air pocket, air poise, air pollution, air potato, air power, air pressure, air pump, air raid, air reconnaissance, air rifle, air sac, air search radar, air shaft, air sick, air sickness, air sock, air space, air speed, air spring, air station, air stove, air terminal, air thermometer, air traffic, air transport, air transportation, air transportation system, air travel, air traveler, air traveller, air unit, air vessel, air wave, air well, airmail letter, black letter, block letter, blue air, breath of fresh air, business letter, calm air, capital letter, castle in the air, chain letter, clear the air, commercial letter of credit, compressed air, cover letter, covering letter, crank letter, current of air, dead air, dead letter, encyclical letter, fan letter, flow of air, form letter, hole in the air, hot air, in the air, industrial air pollution, investment letter, letter, letter a, letter b, letter bomb, letter bond, letter box, letter c, letter carrier, letter case, letter d, letter e, letter f, letter g, letter h, letter i, letter j, letter k, letter l, letter m, letter n, letter o, letter of credit, letter of intent, letter of jeremiah, letter of mark and reprisal, letter of marque, letter of the alphabet, letter opener, letter p, letter paper, letter q, letter r, letter s, letter security, letter stock, letter t, letter telegram, letter u, letter v, letter w, letter writer, letter x, letter y, letter z, light air, liquid air, love letter, lower-case letter, market letter, naval air warfare center weapons division, night letter, on air, open air, open letter, out of thin air, passive air defense, personal letter, polyphonic letter, puff of air, royal air force, runic letter, scarlet letter, sea letter, short letter, small letter, special air service, take the air, thin air, to the letter, traveler's letter of credit, traveller's letter of credit, u. s. air force, united states air force, united states air force academy, up in the air, upper-case letter, us air force, us air force academy, varsity letter, walk on air, walking on air