Noun | 1. | airstream - a relatively well-defined prevailing wind jet stream - a high-speed high-altitude airstream blowing from west to east near the top of the troposphere; has important effects of the formation of weather fronts air current, current of air, wind - air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure; "trees bent under the fierce winds"; "when there is no wind, row"; "the radioactivity was being swept upwards by the air current and out into the atmosphere" |
2. | ![]() flow - any uninterrupted stream or discharge |