1. The noises in a radio receiver or randomly distributed white spots or bands on the screen of a television receiver, caused by interferences from natural electromagnetic disturbances in the atmosphere and the study of such phenomena.
2. The moods or atmospheres; the ambiances: "Fortunately, the atmosphericses of the conference were friendlier than we had anticipated."
3. Unusual conditions in the atmosphere; such as, those caused by lightning, or the continuous short, sharp noises produced by a radio during these conditions.