[at-muh
s-fer-iks, -feer-] 
| 1. | (used with a plural verb) Radio and Television. noise in a radio receiver or randomly distributed white spots or bands on the screen of a television receiver, caused by interference from natural electromagnetic disturbances in the atmosphere. |
| 2. | (used with a singular verb) the study of such phenomena; sferics. |
| 3. | (used with a plural verb) mood or atmosphere; ambience: The atmospherics of the conference were cordial. |